Black Screen Issue After Launching My App Need Help

Hi Everyone,

I recently developed an app using MIT App Inventor, but when I install and launch it on my Android device, the screen stays black. The app does not crash immediately, but it remains unresponsive.

I have checked the following:
The app’s permissions are granted.
The device has sufficient storage and RAM.
No visible errors appear during the build process.

Has anyone faced a similar issue? Could this be caused by a missing component, an incorrect screen initialization, or an issue with an extension?
Any troubleshooting tips or solutions would be greatly appreciated!

Thanks in advance!

Dear @fiwece,
try to make a search in the forum, probably you'll find a good hint:
image

(P.S. have you in the background of Screen1 a too big image ?)