Error from Companion: Font asset not found /storage/emulated/0/Android/data/edu.mit.appinventor.aicompanion3/files/assets/default

Error from Companion: Font asset not found /storage/emulated/0/Android/data/edu.mit.appinventor.aicompanion3/files/assets/default

Please show us your code Blocks please. How are you selecting your fonts? What font are you trying to use and what were you doing when the error occurred? Were you using the Font control. What version of Android?

Have you previously set a custom font in a label and then deleted the font file?

yes, what should I do? I put it back but nothing Happened same error

Find where the custom font was set and change it manually to any font.

This is some kind of error that appears after removing a non-standard font. Then the font is set to standard, but App Inventor looks for it in the asset files.