App inventor was unable to compile this project (an error in the DX stage)

Hello there,
I have 24 screens with repeated blocks and the screens are all repeated because I'm trying to make a quiz program and I put each topic in a screen.
The program was completely fine when


I had 10 screens but when I repeated the screens and I got 24 screens, this issue happened.
please advice.

3 posts were merged into an existing topic: App inventor was unable to compile the project (an error in the DX stage)