Server error: could not save settings. Please try again later!

Every time I load my app it says Server error: could not save settings. Please try again later! I am only trying to open the file and the error occurs. I have several blocks. I don't know if there is a problem with too many blocks or not. The builder seems to hang when I try to access the blocks segment of my screen.

Please help.

TYIA

Can you tell me what the limitation is?