App Crash after Loading using Google colab

[Rattanak Phok]

i couldn't find any error in Logcat, please give me tips or advice to guide me. problem app crash after loading:
+ here is the google colaboratory  link :

https://colab.research.google.com/drive/1XQ9h_zHWk1Hml2zEKR15iAqjuqkioCLH
+ here is the log :

https://pastebin.com/NjWXLtw2

[Robert]

Neither of your links are visible.

The way to debug is to remove the logcat Python filter, to get the Android error message,

If you are using KivyMD 1.1.1 maybe you can go straight to this

https://github.com/Android-for-Python/Android-for-Python-Users#null-pointer-dereference

[Rattanak Phok]

here is the new link sorry https://pastebin.com/Fv9X3vNY

[echidne]

Your link does not work . It look like pastebin did not like your log: