The new version of MIT AI2 generate an APK built that is detected as possible virus for the MS Defender and the APK are deleted automaticaly when it is downloaded.
The APK has an script not right (Wacapew.A!ml) for the MS Defender.
@ewpatton In my mobile the MS Defender also detect the APK as a virus. My question is: If I send the AAB built to the Google Play Store, will the users have the same detection as a virus for the app downloads?
Its safe to upload, ms defender itself is a virus disable that 
Please, can you say it to your users apps? And how?
The thing to do is report it to MS Defender as a false positive, then they can add it to their whitelist.
Are you sure about this solution? I think for MS is not possible put this script in a whitelist because in other platforms (not MIT AI2) could be a security hole.
Edit: We have this problem only from the new August Ai2 version.
We had this many times in the past. It is a problem with defender, not with App Inventor.
Why is now a problem with the new August AI2 version and not in the before version from this last?
We had this anti-virus thing frequently in the past, it goes back many years. Every now and then there are anti virus programs that respond to an apk this way. It is always a false positive.
Ok. Thanks. I have send my apk to the MS link ](Submit a file for malware analysis - Microsoft Security Intelligence) because the Wacapew is not a real script, it is a warning from the MS Machine Learning AI to detect virus. And I had wrote a note to clarify that it was generated for a right builder of the MIT AI2.
