LDAP configuration not working for group_base for gitlab_CE

Hi, we are using 10.8 gitlab_CE edition, For account MGMT we are using LDAP(AD), when we are using LDAP BASE DN its working as expected. As per requirement, we are trying to upgrade LDAP(AD) configuration we are trying to add base and group_base DN but for group base it is thowing error invalid credentials base: 'CN=Git-Access-India,OU=Access-Git,OU=GIT,DC=testdomain,DC=local'

group_base: 'OU=Access-Git,OU=GIT,DC=testdomin,DC=local'