Firebase error is done in the app on real as well as companion

I manually do the do it,

Showng me error also my tags and values are in the database of firebase.
Screenshot 2024-09-25 151203

cannot got value of the tag, my link and token are correct.

Presumably this is after you have called the GetValue?

Check that your value in MobileNumberTextBox.text exists in the firebase data, and that, as a tag, it has a value to return.

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...your When Got Value Block does not make any sense Harsh.

It is receiving the FireBase Tag and the Value - why are you setting the Value to the Value received? It's already there.

There is a danger in using a mobile number as a tag - it can be formatted with or without spaces by the User - do you set the TextBox to numbers only?

Yes