xmjhyfrfrs29 Thanks for the detailed info - that really helps!
Since the game works on another device with the same account and network, this looks more like a device-specific issue, possibly related to how the game initializes on Android 14 or with certain OnePlus configurations.
At this point, try restarting your device completely (power it off for a few minutes, not just a quick restart), then launch the game again. Also make sure the game has all permissions enabled in your phone settings, especially storage and network access.
If you’re using any system features like Game Mode, screen overlays, or performance boosters, try disabling them temporarily and test again - they can sometimes cause a black screen on launch.