GItpod/Gitlab Ouath Issues (SelfHosted)

Hi

I am wondering if someone could see anything obvious

I have set up a local instance of gitpod and added in the correct settings

I setup two auth providers on their side, gitlab.com and self-hosted

more or less exact same setup, however I cannot get it to authenticate against selfhosted gitlab, however no issues with gitlab.com

apologies for the cross post, just trying to see if there is anything obvious I have missed

thanks