Unable to login to Keycloak as Admin. Error: An error occurred, please login again through your application

Hi,

We have the keycloak running inside a docker container. When I try to login using the admin credentials, I see the below error on the browser screen.

An error occurred, please login again through your application.

Not really sure whats going wrong here. Any inputs from the team here will be very helpful.

Thanks in advance

-Srihari.