After migrating my serveur mattermost-docker from version 4.2 to 4.3, the authentication with Gitlab doesn’t work.
Nothing changed about the mattermost configuration (gitlab section).
Gitlab is up to date in version 10.1.0 (API v4)
After the MM authentication form, I am redirected to gitlab then I have a timeout of 30s on the return of “/oauth/authorize”
In Mattermost log:
[2017/10/24 09:54:33 CEST] [github.com/mattermost/mattermost-server/api4.completeOAuth:463] [EROR] AuthorizeOAuthUser: Token Request Failed, Post https://gitlab.xxx.xx/oauth/token: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
Do you have the same problem?