Blank screen when starting app

Good afternoon. I’ve been trying to get the app to work for hours on my Android smartphone, and on BlueStacks, but when I start the app, the screen stays blank.
I have tried everything…
The app consists of Screen 1 only.
The app does not have block code yet, only a visual interface.
Could you help me? What information is needed?
From already thank you very much.

We can’t understand by only what you have siad here please provide screenshot or posible aia so other can find out the issue.

Hello! I’ve already been able to fix it. Thank you very much for answering me anyway.
For those people who have the same problem, in my case I was able to solve the blank screen by filling in the “About” part.
Thanks a lot!

Hi !

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