java.lang.RuntimeException: An error occurred while executing doInBackground()
	at android.os.AsyncTask$4.done(Unknown Source:27)
	at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383)
	at java.util.concurrent.FutureTask.setException(FutureTask.java:252)
	at java.util.concurrent.FutureTask.run(FutureTask.java:271)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
	at java.lang.Thread.run(Thread.java:923)
Caused by: java.lang.IllegalStateException: Failed to decrypt blob
	at android.os.Parcel.createExceptionOrNull(Unknown Source:31)
	at android.os.Parcel.createException(Unknown Source:0)
	at android.os.Parcel.readException(Unknown Source:11)
	at android.os.Parcel.readException(Unknown Source:10)
	at com.android.internal.widget.ILockSettings$Stub$Proxy.verifyCredential(Unknown Source:64)
	at com.android.internal.widget.LockPatternUtils.verifyCredential(Unknown Source:8)
	at com.android.settings.compat.LockPatternUtilsCompat.verifyPassword(Unknown Source:4)
	at com.android.settings.LockPatternChecker$4.doInBackground(Unknown Source:8)
	at com.android.settings.LockPatternChecker$4.doInBackground(Unknown Source:2)
	at android.os.AsyncTask$3.call(Unknown Source:20)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	... 3 more
Caused by: android.os.RemoteException: Remote stack trace:
	at com.android.server.locksettings.SyntheticPasswordCrypto.decryptBlob(Unknown Source:62)
	at com.android.server.locksettings.SyntheticPasswordManager.decryptSPBlob(Unknown Source:0)
	at com.android.server.locksettings.SyntheticPasswordManager.unwrapSyntheticPasswordBlob(Unknown Source:72)
	at com.android.server.locksettings.SyntheticPasswordManager.unwrapPasswordBasedSyntheticPassword(Unknown Source:341)
	at com.android.server.locksettings.LockSettingsService.spBasedDoVerifyCredential(Unknown Source:159)