Firebase authentication problem

Please help me, there was an app made earlier, but now firebase authentic is not working in that app, "failed regulation of: Lcom/google/android/gms/safetynet/SafetyNet; this text is coming, what is the solution to this problem. .?

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2 posts were merged into an existing topic: failed resoulution of : lcom/google/android/gms/safetynet/safetynet;