Hi OeAi,
When you packaged, did you put the obb inside the apk?
Also, looks like a shipping log, which isn’t gonna really help much for diagnosing your problem. Can you package your project for development and give us those logcat logs?
The ‘failed to open descriptor file game.uproject’ error does likely mean that either the obb is missing, or the uproject was not packaged, and it does not seem to be the latter if you were not getting failed builds.
Thanks!