I originally posted this on Answer Hub a few days ago and have not received any responses. Hopefully someone here will have an answer to this. Added note, i am using engine version 4.8.3.
I have 2 published Android apps on Google Play that is having a weird problem (a Free and a Paid version, both with OBB files). Some people are getting this “Android XAPK File Validation failed” error. For many of them the Free version of the game downloads and plays just fine, but when they would attempt to download the Paid version of the game only the APK would download (no OBB). Then the downloader would load with my image (the one set in the Android Project Settings) and end up going to a black screen and crash. Some would then get the error “Android XAPK File Validation failed”. Also worth noting is that for some people the Paid downloads and installs just fine but the Free will not download the OBB, so it seems to be pretty random when the Google Play store does not download the OBB itself.
We actually had the exact same problem on 1 of our 4 Android test phones when downloading both versions from the Google Play store. One version of the game downloads and runs just fine while the other only downloads the APK then has this same error.
We tried uninstalling and redownloading the game multiple times to see if the OBB would eventually download, but no luck.
Then we downloaded a BETA version of our game from the Google Play beta, and it actually downloaded that OBB from the store and installed just fine. Then when we removed the phone from the BETA and downloaded the PRODUCTION version again from the normal store (which initially did not work), it actually downloaded the OBB and installed just fine.
Would checking “Disable verify OBB on first start/update” in the Android Project Settings help this? I’ve looked around to see what this even does and could not find a definite answer. It’s wording does sound like it could fix my problem, I just want to be sure as I now cannot test this as the game is downloading and installing on all of my devices just fine.
Any information would be very much appreciated. Thanks.