Open registration is enabled on your instance

I’ve installed GitLab community edition 13.6(ubuntu) hosted on EC2 instance. Everything went well created new project and pushed from local.The main issue is only in admin accounts soon after logged in its showing the following error "Open registration is enabled on your instance"
Learn more about how you can customize / disable registration on your instance.! Also find the screen shot attached.In EC2 security groups i tried removing open portsand gave only my IP also and the popup is showing persistently.But the Push and pull are perfectly working,