Gitlab-Sonarqube integratoin

Sonarqube version : Enterprise edition - 8.9


We are integrating Sonarqube (Enterprise edition) with Gitlab (community edition) . After providing the details in Administrator → ALM Configuration, I was able to see the login button of Gitlab on sonarqube login page.

However wen we click on the login button, getting following error

You’re not authorized to access this page. Please contact the administrator.

Please note that our Gitlab instance is on secure https and sonarqube is on http.