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    This is caused by using legacy commands from older versions of Firebase. Look for the new documentation and try using only the new SDK

Solutions on the web

via Stack Overflow by Modge
, 1 year ago
Unable to create application com.android.tools.fd.runtime.BootstrapApplication: java.lang.IllegalStateException: FirebaseApp with name [DEFAULT] doesn't exist.
via GitHub by vrjgamer
, 7 months ago
Unable to create application com.vrjco.v.someapp.App: java.lang.IllegalStateException: FirebaseApp with name [DEFAULT] doesn't exist.
via GitHub by MichaelArchangel
, 1 year ago
Unable to create application com.velotech.veer.VEApp: java.lang.NullPointerException
via Stack Overflow by zhanzhan0812
, 8 months ago
Unable to create application com.example.galina.demo.MainApplication: java.lang.NullPointerException
via Stack Overflow by Apn17
, 2 years ago
Unable to create application com.neu.val.activity.VoiceApplication: java.lang.NullPointerException
via GitHub by nscherer
, 2 years ago
Unable to create application com.activeandroid.app.Application: java.lang.NullPointerException
java.lang.IllegalStateException: FirebaseApp with name [DEFAULT] doesn't exist. 	at com.google.firebase.FirebaseApp.getInstance(Unknown Source)	at com.google.firebase.FirebaseApp.getInstance(Unknown Source)	at com.google.firebase.auth.FirebaseAuth.getInstance(Unknown Source)	at com.redstar.collectors.MainApplication.onCreate(MainApplication.java:22)	at com.android.tools.fd.runtime.BootstrapApplication.onCreate(BootstrapApplication.java:369)	at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1013)	at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4609)