Firebase Error Is it bug or what

I am facing problem in firebase authentication it shows error
For a custom firebase host you must first set your authentication server before using authentication features
it is working well but i decided to make a copy of my app and i should work on the copied one with a new idea for a particular screen so renamed it and make firebase project and add app and upload its goggle jason file as i did in the original one.original works well but new have problem.

i searched in community and i get rough idea to solve this problem is to delete firebase auth and google file and refesh the screen, add new fire-base auth and file and problem is solved
But not solved please help

did you set location to us-central ?


Last problem is solved but new arise

Kodular is unable to compile this project.
The compiler error output was
________Preparing application icon
________Creating animation xml
________Creating fragment xml
________Creating listview xml in res/layout/…
________Creating listview xml in res/layout-v21/…
________Creating xml in res/drawable/…
________Creating splash png in res/drawable/…
________Creating colors xml
________Creating styles xml
________Creating drawables xml v21
________Checking for firebase
________________Firebase components found.
________________Firebase config file error.

i searched for it and i got that i need to upload google-services.json again i did it but problem is at it is

Are You Using Firebase Authentication also or Only Firebase Database?

problem is solved their is minor mistake in package name it is capital letters and small letter mistake

I am using both but problem solved

can you please tell us the process to solve this problem

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