After sign up with google ke baad ye error dikha rha hai
How to fix this error?
See block image where I think there’s a mistake in it.
Sorry, I was wrong there. The problem is because the screen does not have a start value
So, the problem is there:
Make sure you annotate a start value when opening this screen 
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If you have select item from a list then you have to build a list (here list means start value ).