Need help with: ERROR Backend 'setuptools.build_meta:__legacy__' is not available.

[Cube123]

Hello,

I am getting the following error when trying to create a new release AAB file for my Kivy app:

ERROR Backend 'setuptools.build_meta:__legacy__' is not available.

My current configuration is:

• android.api = 36
• android.minapi = 24
• android.ndk = 28c
• android.archs = arm64-v8a
• p4a.branch = develop

I am confused because previous builds worked correctly, but this issue has started occurring recently.

To try to fix it, I have already attempted the following:

• Installed/downgraded:
  • setuptools (82 → 65.5.0)
  • wheel (0.46.3 → 0.43.0)
  • pip (26.0.1 → 23.3.1)
• Changed p4a.branch to stable and also tried master
• Attempted to bypass build isolation using:
  • PIP_NO_BUILD_ISOLATION=0 and PIP_NO_BUILD_ISOLATION=1 before running the build

Despite all of this, the error still persists.

Has anyone encountered this issue or knows how to resolve it?

Thank you very much!