Compilation issue, Firebase config file error

I am getting such an error, what is the solution?

these are my blocks

Already plenty of suggestion, solution, even guide also created for this problem…

  1. Firebase url is missing in your google-json file (edit with text pad and add after the package name
  2. package name may be mismatch with firebase added app and this app
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Refer to this guide by @Tekwizer may be this helps you

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thanks i found the solution in this video