Thunkable Live app not working - new user

Hi
I am brand new to Thunkable and have an issue that when i open the app it allows me to access my app but as soon as it gets in the screen goes blank, I have tried deleating the last couple of screens i have created so it is back at the point it was before the issue occured but still having problems, Help would be appreciated.

NOTE NO LONGER NEEDED PROBLEM FIXED