python-for-android failed to make a webview app

[Inlife]

the command:

p4a apk --private $HOME/WebApp --package=org.example.myapp --name "My WebView Application" --version 0.1 --bootstrap=webview --requirements=flask --port=5000 --sdk-dir=/home/inlife/Android/Sdk --android-api 30 --APP_PLATFORM android-30

the code:

from flask import Flask

app = Flask(__name__)

@app.route('/')
def hello():
    return "Hello world!"

if __name__ == "__main__":
    app.run(debug=False)

the issue:

[INFO]:    Building genericndkbuild for armeabi-v7a
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/bootstrap_builds/webview/jni
[INFO]:    -> running ndk-build V=1
           working: /home/inlife/.buildozer/android/platform/android-ndk-r19c/build/core/setup-app-platform.mk:101: *** Android NDK...(and 23 more)  Exception in thread background thread for pid 33545:
Traceback (most recent call last):
  File "/usr/lib/python3.8/threading.py", line 932, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.8/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "/home/inlife/.local/lib/python3.8/site-packages/sh.py", line 1662, in wrap
    fn(*args, **kwargs)
  File "/home/inlife/.local/lib/python3.8/site-packages/sh.py", line 2606, in background_thread
    handle_exit_code(exit_code)
  File "/home/inlife/.local/lib/python3.8/site-packages/sh.py", line 2304, in fn
    return self.command.handle_command_exit_code(exit_code)
  File "/home/inlife/.local/lib/python3.8/site-packages/sh.py", line 877, in handle_command_exit_code
    raise exc
sh.ErrorReturnCode_2:

  RAN: /home/inlife/.buildozer/android/platform/android-ndk-r19c/ndk-build V=1

  STDOUT:
Android NDK: Found platform level in /home/inlife/.local/share/python-for-android/build/bootstrap_builds/webview/project.properties. Setting APP_PLATFORM to android-30.   
Android NDK: android-30 is above the maximum supported version android-28. Choose a supported API level or set APP_PLATFORM to "latest".   
/home/inlife/.buildozer/android/platform/android-ndk-r19c/build/core/setup-app-platform.mk:101: *** Android NDK: Aborting.    .  Stop.


  STDERR:

Traceback (most recent call last):                                                                                                                  
  File "/home/inlife/.local/bin/p4a", line 8, in <module>
    sys.exit(main())
  File "/home/inlife/.local/lib/python3.8/site-packages/pythonforandroid/entrypoints.py", line 18, in main
    ToolchainCL()
  File "/home/inlife/.local/lib/python3.8/site-packages/pythonforandroid/toolchain.py", line 709, in __init__
    getattr(self, command)(args)
  File "/home/inlife/.local/lib/python3.8/site-packages/pythonforandroid/toolchain.py", line 154, in wrapper_func
    build_dist_from_args(ctx, dist, args)
  File "/home/inlife/.local/lib/python3.8/site-packages/pythonforandroid/toolchain.py", line 213, in build_dist_from_args
    build_recipes(build_order, python_modules, ctx,
  File "/home/inlife/.local/lib/python3.8/site-packages/pythonforandroid/build.py", line 577, in build_recipes
    recipe.build_arch(arch)
  File "/home/inlife/.local/lib/python3.8/site-packages/pythonforandroid/recipes/genericndkbuild/__init__.py", line 28, in build_arch
    shprint(sh.ndk_build, "V=1", _env=env)
  File "/home/inlife/.local/lib/python3.8/site-packages/pythonforandroid/logger.py", line 167, in shprint
    for line in output:
  File "/home/inlife/.local/lib/python3.8/site-packages/sh.py", line 925, in next
    self.wait()
  File "/home/inlife/.local/lib/python3.8/site-packages/sh.py", line 849, in wait
    self.handle_command_exit_code(exit_code)
  File "/home/inlife/.local/lib/python3.8/site-packages/sh.py", line 877, in handle_command_exit_code
    raise exc
sh.ErrorReturnCode_2:

  RAN: /home/inlife/.buildozer/android/platform/android-ndk-r19c/ndk-build V=1

  STDOUT:
Android NDK: Found platform level in /home/inlife/.local/share/python-for-android/build/bootstrap_builds/webview/project.properties. Setting APP_PLATFORM to android-30.   
Android NDK: android-30 is above the maximum supported version android-28. Choose a supported API level or set APP_PLATFORM to "latest".   
/home/inlife/.buildozer/android/platform/android-ndk-r19c/build/core/setup-app-platform.mk:101: *** Android NDK: Aborting.    .  Stop.


The full logs:

[INFO]:    Will compile for the following archs: armeabi-v7a
[INFO]:    Getting Android API version from user argument: 30
[INFO]:    Available Android APIs are (30)
[INFO]:    Requested API target 30 is available, continuing.
[INFO]:    Found possible NDK dirs in buildozer dir: android-ndk-r19c
[INFO]:    Will attempt to use NDK at /home/inlife/.buildozer/android/platform/android-ndk-r19c
[WARNING]: This NDK lookup is intended for debug only, if you use python-for-android much you should probably maintain your own NDK download.
[INFO]:    Found NDK version 19c
[WARNING]: NDK API target was not set manually, using the default of 21 = min(android-api=30, default ndk-api=21)
[INFO]:    Found the following toolchain versions: ['4.9']
[INFO]:    Picking the latest gcc toolchain, here 4.9
[INFO]:    No existing dists meet the given requirements!
[INFO]:    No dist exists that meets your requirements, so one will be built.
[INFO]:    Found a single valid recipe set: ['hostpython3', 'libffi', 'openssl', 'sqlite3', 'python3', 'genericndkbuild', 'setuptools', 'flask', 'six', 'pyjnius', 'android']
[INFO]:    The selected bootstrap is webview
[INFO]:    # Creating dist with webview bootstrap
[INFO]:    Dist will have name unnamed_dist_1 and requirements (flask)
[INFO]:    Dist contains the following requirements as recipes: ['hostpython3', 'libffi', 'openssl', 'sqlite3', 'python3', 'genericndkbuild', 'setuptools', 'flask', 'six', 'pyjnius', 'android']
[INFO]:    Dist will also contain modules (itsdangerous, click, werkzeug, jinja2, markupsafe) installed from pip
[INFO]:    Dist will be build in mode debug
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/bootstrap_builds/webview
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Recipe build order is ['hostpython3', 'libffi', 'openssl', 'sqlite3', 'python3', 'genericndkbuild', 'setuptools', 'flask', 'six', 'pyjnius', 'android']
[INFO]:    The requirements (click, itsdangerous, jinja2, markupsafe, werkzeug) were not found as recipes, they will be installed with pip.
[INFO]:    # Downloading recipes
[INFO]:    Downloading hostpython3
[INFO]:    -> running mkdir -p /home/inlife/.local/share/python-for-android/packages/hostpython3
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/packages/hostpython3
[INFO]:    -> running basename https://www.python.org/ftp/python/3.8.1/Python-3.8.1.tgz
[INFO]:    -> running rm -f .mark-Python-3.8.1.tgz                                                                                                  
[INFO]:    Downloading hostpython3 from https://www.python.org/ftp/python/3.8.1/Python-3.8.1.tgz
[INFO]:    -> running touch .mark-Python-3.8.1.tgz
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Downloading libffi
[INFO]:    -> running mkdir -p /home/inlife/.local/share/python-for-android/packages/libffi
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/packages/libffi
[INFO]:    -> running basename https://github.com/libffi/libffi/archive/8fa8837.tar.gz
[INFO]:    -> running rm -f .mark-8fa8837.tar.gz                                                                                                    
[INFO]:    Downloading libffi from https://github.com/libffi/libffi/archive/8fa8837.tar.gz
[INFO]:    -> running touch .mark-8fa8837.tar.gz
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Downloading openssl
[INFO]:    -> running mkdir -p /home/inlife/.local/share/python-for-android/packages/openssl
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/packages/openssl
[INFO]:    -> running basename https://www.openssl.org/source/openssl-1.1.1f.tar.gz
[INFO]:    -> running rm -f .mark-openssl-1.1.1f.tar.gz                                                                                             
[INFO]:    Downloading openssl from https://www.openssl.org/source/openssl-1.1.1f.tar.gz
[INFO]:    -> running touch .mark-openssl-1.1.1f.tar.gz
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Downloading sqlite3
[INFO]:    -> running mkdir -p /home/inlife/.local/share/python-for-android/packages/sqlite3
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/packages/sqlite3
[INFO]:    -> running basename https://www.sqlite.org/2016/sqlite-amalgamation-3150100.zip
[INFO]:    -> running rm -f .mark-sqlite-amalgamation-3150100.zip                                                                                   
[INFO]:    Downloading sqlite3 from https://www.sqlite.org/2016/sqlite-amalgamation-3150100.zip
[INFO]:    -> running touch .mark-sqlite-amalgamation-3150100.zip
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Downloading python3
[INFO]:    -> running mkdir -p /home/inlife/.local/share/python-for-android/packages/python3
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/packages/python3
[INFO]:    -> running basename https://www.python.org/ftp/python/3.8.1/Python-3.8.1.tgz
[INFO]:    -> running rm -f .mark-Python-3.8.1.tgz                                                                                                  
[INFO]:    Downloading python3 from https://www.python.org/ftp/python/3.8.1/Python-3.8.1.tgz
[INFO]:    -> running touch .mark-Python-3.8.1.tgz
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Downloading genericndkbuild
[INFO]:    Skipping genericndkbuild download as no URL is set
[INFO]:    Downloading setuptools
[INFO]:    -> running mkdir -p /home/inlife/.local/share/python-for-android/packages/setuptools
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/packages/setuptools
[INFO]:    -> running basename https://pypi.python.org/packages/source/s/setuptools/setuptools-40.9.0.zip
[INFO]:    -> running rm -f .mark-setuptools-40.9.0.zip                                                                                             
[INFO]:    Downloading setuptools from https://pypi.python.org/packages/source/s/setuptools/setuptools-40.9.0.zip
[INFO]:    -> running touch .mark-setuptools-40.9.0.zip
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Downloading flask
[INFO]:    -> running mkdir -p /home/inlife/.local/share/python-for-android/packages/flask
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/packages/flask
[INFO]:    -> running basename https://github.com/pallets/flask/archive/0.10.1.zip
[INFO]:    -> running rm -f .mark-0.10.1.zip                                                                                                        
[INFO]:    Downloading flask from https://github.com/pallets/flask/archive/0.10.1.zip
[INFO]:    -> running touch .mark-0.10.1.zip
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Downloading six
[INFO]:    -> running mkdir -p /home/inlife/.local/share/python-for-android/packages/six
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/packages/six
[INFO]:    -> running basename https://pypi.python.org/packages/source/s/six/six-1.10.0.tar.gz
[INFO]:    -> running rm -f .mark-six-1.10.0.tar.gz                                                                                                 
[INFO]:    Downloading six from https://pypi.python.org/packages/source/s/six/six-1.10.0.tar.gz
[INFO]:    -> running touch .mark-six-1.10.0.tar.gz
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Downloading pyjnius
[INFO]:    -> running mkdir -p /home/inlife/.local/share/python-for-android/packages/pyjnius
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/packages/pyjnius
[INFO]:    -> running basename https://github.com/kivy/pyjnius/archive/1.2.1.zip
[INFO]:    -> running rm -f .mark-1.2.1.zip                                                                                                         
[INFO]:    Downloading pyjnius from https://github.com/kivy/pyjnius/archive/1.2.1.zip
[INFO]:    -> running touch .mark-1.2.1.zip
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Downloading android
[INFO]:    Skipping android download as no URL is set
[INFO]:    # Building all recipes for arch armeabi-v7a
[INFO]:    # Unpacking recipes
[INFO]:    Unpacking hostpython3 for armeabi-v7a
[INFO]:    -> running basename https://www.python.org/ftp/python/3.8.1/Python-3.8.1.tgz
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/hostpython3/desktop                                 
[INFO]:    -> running mv Python-3.8.1 /home/inlife/.local/share/python-for-android/build/other_builds/hostpython3/desktop/hostpython3
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Unpacking libffi for armeabi-v7a
[INFO]:    -> running basename https://github.com/libffi/libffi/archive/8fa8837.tar.gz
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/libffi/armeabi-v7a__ndk_target_21                   
[INFO]:    -> running mv libffi-8fa88373a1d433c675b11200ccd58418e91f81e4 /home/inlife/.local/share/python-for-android/buil...(and 55 more)
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Unpacking openssl for armeabi-v7a
[INFO]:    -> running basename https://www.openssl.org/source/openssl-1.1.1f.tar.gz
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/openssl/armeabi-v7a__ndk_target_21                  
[INFO]:    -> running mv openssl-1.1.1f /home/inlife/.local/share/python-for-android/build/other_builds/openssl/armeabi-v7...(and 27 more)
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Unpacking sqlite3 for armeabi-v7a
[INFO]:    -> running basename https://www.sqlite.org/2016/sqlite-amalgamation-3150100.zip
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/sqlite3/armeabi-v7a__ndk_target_21                  
[INFO]:    -> running mv sqlite-amalgamation-3150100 /home/inlife/.local/share/python-for-android/build/other_builds/sqlit...(and 37 more)
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Unpacking python3 for armeabi-v7a
[INFO]:    -> running basename https://www.python.org/ftp/python/3.8.1/Python-3.8.1.tgz
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/python3/armeabi-v7a__ndk_target_21                  
[INFO]:    -> running mv Python-3.8.1 /home/inlife/.local/share/python-for-android/build/other_builds/python3/armeabi-v7a_...(and 22 more)
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Unpacking genericndkbuild for armeabi-v7a
[INFO]:    Skipping genericndkbuild unpack as no URL is set
[INFO]:    Unpacking setuptools for armeabi-v7a
[INFO]:    -> running basename https://pypi.python.org/packages/source/s/setuptools/setuptools-40.9.0.zip
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/setuptools/armeabi-v7a__ndk_target_21               
[INFO]:    -> running mv setuptools-40.9.0 /home/inlife/.local/share/python-for-android/build/other_builds/setuptools/arme...(and 33 more)
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Unpacking flask for armeabi-v7a
[INFO]:    -> running basename https://github.com/pallets/flask/archive/0.10.1.zip
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/flask/armeabi-v7a__ndk_target_21                    
[INFO]:    -> running mv flask-0.10.1 /home/inlife/.local/share/python-for-android/build/other_builds/flask/armeabi-v7a__ndk_target_21/flask
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Unpacking six for armeabi-v7a
[INFO]:    -> running basename https://pypi.python.org/packages/source/s/six/six-1.10.0.tar.gz
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/six/armeabi-v7a__ndk_target_21                      
[INFO]:    -> running mv six-1.10.0 /home/inlife/.local/share/python-for-android/build/other_builds/six/armeabi-v7a__ndk_target_21/six
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Unpacking pyjnius for armeabi-v7a
[INFO]:    -> running basename https://github.com/kivy/pyjnius/archive/1.2.1.zip
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/pyjnius-genericndkbuild/armeabi-v7a__ndk_target_21  
[INFO]:    -> running mv pyjnius-1.2.1 /home/inlife/.local/share/python-for-android/build/other_builds/pyjnius-genericndkb...(and 39 more)
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    -> running rm -rf /home/inlife/.local/share/python-for-android/build/other_builds/android-genericndkbuild/armea...(and 29 more)
[INFO]:    -> running cp -a /home/inlife/.local/lib/python3.8/site-packages/pythonforandroid/recipes/android/src /home/inl...(and 113 more)
[INFO]:    # Prebuilding recipes
[INFO]:    Prebuilding hostpython3 for armeabi-v7a
[INFO]:    hostpython3 has no prebuild_armeabi_v7a, skipping
[INFO]:    Applying patches for hostpython3[armeabi-v7a]
[INFO]:    Applying patch patches/pyconfig_detection.patch
[INFO]:    -> running patch -t -d /home/inlife/.local/share/python-for-android/build/other_builds/hostpython3/desktop/host...(and 132 more)
[INFO]:    -> running touch /home/inlife/.local/share/python-for-android/build/other_builds/hostpython3/desktop/hostpython3/.patched                
[INFO]:    Prebuilding libffi for armeabi-v7a
[INFO]:    libffi has no prebuild_armeabi_v7a, skipping
[INFO]:    Applying patches for libffi[armeabi-v7a]
[INFO]:    Applying patch remove-version-info.patch
[INFO]:    -> running patch -t -d /home/inlife/.local/share/python-for-android/build/other_builds/libffi/armeabi-v7a__ndk_...(and 129 more)
[INFO]:    -> running touch /home/inlife/.local/share/python-for-android/build/other_builds/libffi/armeabi-v7a__ndk_target...(and 19 more)          
[INFO]:    Prebuilding openssl for armeabi-v7a
[INFO]:    openssl has no prebuild_armeabi_v7a, skipping
[INFO]:    Prebuilding sqlite3 for armeabi-v7a
[INFO]:    sqlite3 has no prebuild_armeabi_v7a, skipping
[INFO]:    Prebuilding python3 for armeabi-v7a
[INFO]:    python3 has no prebuild_armeabi_v7a, skipping
[INFO]:    Applying patches for python3[armeabi-v7a]
[INFO]:    Applying patch patches/pyconfig_detection.patch
[INFO]:    -> running patch -t -d /home/inlife/.local/share/python-for-android/build/other_builds/python3/armeabi-v7a__ndk...(and 139 more)
[INFO]:    Applying patch patches/py3.8.1.patch                                                                                                     
[INFO]:    -> running patch -t -d /home/inlife/.local/share/python-for-android/build/other_builds/python3/armeabi-v7a__ndk...(and 128 more)
[INFO]:    Applying patch patches/py3.8.1_fix_cortex_a8.patch                                                                                       
[INFO]:    -> running patch -t -d /home/inlife/.local/share/python-for-android/build/other_builds/python3/armeabi-v7a__ndk...(and 142 more)
[INFO]:    -> running touch /home/inlife/.local/share/python-for-android/build/other_builds/python3/armeabi-v7a__ndk_targe...(and 21 more)          
[INFO]:    Prebuilding genericndkbuild for armeabi-v7a
[INFO]:    genericndkbuild has no prebuild_armeabi_v7a, skipping
[INFO]:    Prebuilding setuptools for armeabi-v7a
[INFO]:    setuptools has no prebuild_armeabi_v7a, skipping
[INFO]:    Prebuilding flask for armeabi-v7a
[INFO]:    flask has no prebuild_armeabi_v7a, skipping
[INFO]:    Prebuilding six for armeabi-v7a
[INFO]:    six has no prebuild_armeabi_v7a, skipping
[INFO]:    Prebuilding pyjnius for armeabi-v7a
[INFO]:    pyjnius has no prebuild_armeabi_v7a, skipping
[INFO]:    Applying patches for pyjnius[armeabi-v7a]
[INFO]:    Applying patch genericndkbuild_jnienv_getter.patch
[INFO]:    -> running patch -t -d /home/inlife/.local/share/python-for-android/build/other_builds/pyjnius-genericndkbuild/...(and 158 more)
[INFO]:    -> running touch /home/inlife/.local/share/python-for-android/build/other_builds/pyjnius-genericndkbuild/armeab...(and 37 more)          
[INFO]:    Prebuilding android for armeabi-v7a
[INFO]:    android has no prebuild_armeabi_v7a, skipping
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/android-genericndkbuild/armeabi-v7a__ndk_target_21/android
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    # Building recipes
[INFO]:    Building hostpython3 for armeabi-v7a
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/hostpython3/desktop/hostpython3/native-build
[INFO]:    -> running configure
[INFO]:    <- directory context /home/inlife/Desktop/WebApp                                                                                         
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/hostpython3/desktop/hostpython3
[INFO]:    -> running make -j 1 -C /home/inlife/.local/share/python-for-android/build/other_builds/hostpython3/desktop/hos...(and 21 more)
[INFO]:    -> running cp /home/inlife/.local/share/python-for-android/build/other_builds/hostpython3/desktop/hostpython3/n...(and 135 more)         
[INFO]:    <- directory context /home/inlife/Desktop/WebApp
[INFO]:    Building libffi for armeabi-v7a
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/libffi/armeabi-v7a__ndk_target_21/libffi
[INFO]:    -> running autogen.sh
[INFO]:    -> running autoreconf -vif                                                                                                               
[INFO]:    -> running configure --host=arm-linux-androideabi --prefix=/home/inlife/.local/share/python-for-android/build/o...(and 87 more)          
[INFO]:    -> running make -j 1 libffi.la                                                                                                           
[INFO]:    <- directory context /home/inlife/Desktop/WebApp                                                                                         
[INFO]:    -> running cp /home/inlife/.local/share/python-for-android/build/other_builds/libffi/armeabi-v7a__ndk_target_21...(and 118 more)
[INFO]:    Building openssl for armeabi-v7a
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/openssl/armeabi-v7a__ndk_target_21/openssl1.1
[INFO]:    -> running perl Configure shared no-dso no-asm android-arm -D__ANDROID_API__=21
[INFO]:    Applying patch disable-sover.patch                                                                                                       
[INFO]:    -> running patch -t -d /home/inlife/.local/share/python-for-android/build/other_builds/openssl/armeabi-v7a__ndk...(and 129 more)
[INFO]:    -> running make build_libs                                                                                                               
[INFO]:    <- directory context /home/inlife/Desktop/WebApp                                                                                         
[INFO]:    -> running cp /home/inlife/.local/share/python-for-android/build/other_builds/openssl/armeabi-v7a__ndk_target_2...(and 246 more)
[INFO]:    Building sqlite3 for armeabi-v7a
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/sqlite3/armeabi-v7a__ndk_target_21/sqlite3
[INFO]:    -> running ndk-build V=1 NDK_DEBUG=1 APP_PLATFORM=android-21 APP_ABI=armeabi-v7a
[INFO]:    <- directory context /home/inlife/Desktop/WebApp                                                                                         
[INFO]:    Building python3 for armeabi-v7a
[INFO]:    Activating flags for sqlite3
[INFO]:    Activating flags for libffi
[INFO]:    Activating flags for openssl
[INFO]:    Activating flags for android's zlib
[INFO]:    -> directory context /home/inlife/.local/share/python-for-android/build/other_builds/python3/armeabi-v7a__ndk_target_21/python3/android-build
[INFO]:    -> running configure --host=arm-linux-androideabi --build=x86_64-pc-linux-gnu --enable-shared --enable-ipv6 ac_...(and 265 more)
[INFO]:    -> running make all -j 1 INSTSONAME=libpython3.8m.so                                                                                     
[INFO]:    <- directory context /home/inlife/Desktop/WebApp 

[Robert Flatt]

I don't know if Webview works, but the SDK specified doesnt.

Android NDK: android-30 is above the maximum supported version android-28. Choose a supported API level or set APP_PLATFORM to "latest".