Fatal Exception: java.lang.RuntimeException startPreview failed

[mnewlive]

Fatal Exception: java.lang.RuntimeException: startPreview failed
at android.hardware.Camera.startPreview(Camera.java)
at com.google.android.gms.vision.CameraSource.start(CameraSource.java:24)
at com.saltedge.authenticator.features.qr.QrScannerActivity.startCameraSource(QrScannerActivity.java:174)
at com.saltedge.authenticator.features.qr.QrScannerActivity.access$onReceivedCodes(QrScannerActivity.java:54)
at com.saltedge.authenticator.features.qr.QrScannerActivity$setupViewModel$2.onChanged(QrScannerActivity.java:100)
at com.saltedge.authenticator.features.qr.QrScannerActivity$setupViewModel$2.onChanged(QrScannerActivity.java:54)
at androidx.lifecycle.LiveData.considerNotify(LiveData.java:131)
at androidx.lifecycle.LiveData.dispatchingValue(LiveData.java:149)
at androidx.lifecycle.LiveData.setValue(LiveData.java:307)
at androidx.lifecycle.MutableLiveData.setValue(MutableLiveData.java:50)
at androidx.lifecycle.LiveData$1.run(LiveData.java:91)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7081)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)