GitLab Geo Web Login shows - You cannot perfrom write operations on a read-only instance

I have configured the GitLab Geo, As per the below link at step-7, i can see the login page of secondary node instance web page. when i tried to enter my LDAP credentials, it shows below error.

https://docs.gitlab.com/ee/administration/geo/replication/configuration.html

On Login screen i am seeing You cannot perform write operations on a read-only instance message.

On my primary node LDAP configured. Similarly on secondary node i too configured the LDAP in gitlab.rb file.

Any other settings/configured need to be enabled?