If you have set the SSO Domain to an invalid value, you may be prevented from authenticating to the Crowd Console.
To reset the SSO (single sign-on) cookie domain, run the following SQL command on the Crowd database:
update cwd_property set property_value = '' where property_name = 'domain';
Once you have done this you will need to restart Crowd, clear your browser's cache and then log in. This will reset any domain SSO token misconfiguration.