Android Google Account Manager 6.0.1 [patched]
After wiping your Marshmallow device, you enter the correct email/password, but the device rejects it. The issue lies in a corrupted Account Manager cache or a mismatch between the installed Google Play Services version and Account Manager 6.0.1.
Account Manager 6.0.1 relies heavily on Google Play Services. An outdated Play Services will cause authentication failures. android google account manager 6.0.1