Firebase data change doesn't work for me

[ElMaxicero4 (YoMaxi Company)]

I would like to call a value if it changed in the Firebase database.
This is the data structure:

These are my blocks:

And nothing just appears when a change is made to this Firebase structure.

What am I doing wrong?

[ElMaxicero4 (YoMaxi Company)]

Is there a complete guide about this block?

[Still-learning (1-2-3-4...)]

I hope you might have ticked persist. Until it and try

Firebase data changed

Data changed is triggered whenever the app detects a difference between the local firebase and the cloud. If you turn off Persist, you get Data Changed triggers at app launch. Otherwise, you only get the event when a change is detected by the app (because of the way this works, checking local and cloud, it’s not fully reliable in case of bad network connection). Hopefully this answers your question.

[ElMaxicero4 (YoMaxi Company)]

I had checked it, but never tried the persist for the reason that it always threw me an error.