Firebase Authentication problem

For the record, it was working fine

Are you going to show your relevant blocks or should people just guess?

You have missed the logical sequence in blocks it seems. Show your blocks

I’ve been working on this app for a while and everything was working fine, but now it’s crashing a lot, for example, it worked fine many times before, but now it’s crashing even though I didn’t change the blocks I didn’t even touch it!!?
This is my block

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