My firebase doesn't work, why?

MIT App Inventor Help
1

the application is very simple, and has screens where doing the same or more complex things firebase works. But when I go to the new screen I have made, it does not return any value.
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It just happens in this screen, the others work fine with the same firebase, and I changed nothing.

I have already solved it. I deleted the screen, made another one, and for some reason the new one worked :sob::sob::sob:

2

That initialize global user looks fishy.

Do the initialization in the Screen Initialization event block.

3

Have you checked that the token, URL and projectBucket are the same on both screens?