I also tried to update my app bud when I install the build on my Andoid 13 phone I get the error:
The Application wasn't installed, because the whole package looks unproperly
If I get a older build it installs fine, bud if I build it today I get the error. I deleted the Mifare Extension and then it installs again. I also tried the MifareInfo.aia bud it haves the same problem.
The culprit is probably to do with the SDK version used by appinventor as mentioned here: Application is OK, but I can't install it (APK) on my (Android13) smartphone - #25 by ewpatton
Could you have a look to fix you’re amazing extension so it is usable again on android 13?
Have a great day!