I ran into this and it turned out to be a problem where we had enabled Mobile HDR in Project Settings but disabled it in the device’s profile in DefaultDeviceProfiles.ini. The project setting was telling the project to cook content for HDR and then at runtime, the DefaultDeviceProfiles.ini setting was telling the app to look for non-HDR content which didn’t exist.
You will probably want to make a thread for your issue on AnswerHub, as that attached photo of your error is too small to see here, and it will be easier to track on AH. Logcat logs will also be very helpful to diagnosing what’s happening on your device. You might consider searching AnswerHub for errors like the one you’ve mentioned. If you can’t find an existing thread, here is how to post a thread on AnswerHub.