App inventor can't generate a QR code

I've created a app in app inventor that have many screens. I don't know if app inventor have limited screens because i can't generate a QR code to view the app in my cellphone. What can i do?
It says Server error: compilation failed. Please, try again later.

how many screens do you have?
the recommendation is to use less than 10 screens, see also


Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by Taifun.