Android XAPK file validation fails on only fresh versions of app

Hello,
I’m trying to distribute a test app through Play, but something weird happens. Here’s how it goes:
I install a brand new version of my app onto my phone. It’s size is 117 MB so I know the OBB is coming through with the APK.
When I run the app, I get “XAPK file validation failed”, and the app crashes.
BUT…
If I manually install my app with the batch file created when packaging the app, it works just fine.
But here’s the weird part, if I uninstall this working version and try to install it from Play again, it works! I have to to this for every new version.
So to get it working from Play, I must first install it manually, uninstall it, then install it from Play.
Obviously users on Play can’t do this, so I need help.
Any ideas? Please?

Tyjaco,

Please package the OBB into the APK or upload the OBB file to the store along with your APK. The only reason that this error would occur is if the OBB file is missing.

[Forums: XAPK file validation error][1]

Thank you!

XAPK File validation failed - Mobile - Epic Developer Community Forums