Mattermost, Inc.

The system admin has turned off OAuth2 Service Provider?

Summary

error message -> the system admin has turned off OAuth2 Service Provider.

Steps to reproduce

reverse proxy config : https://blogs.msdn.microsoft.com/friis/2016/08/25/iis-with-url-rewrite-as-a-reverse-proxy-part-2-dealing-with-500-52-status-codes/

ver : Team Edition 5.12.0

Expected behavior

reverse proxy ?

Observed behavior

public PC -> GitLab web direct connection login OK

public PC -> mattermost gitlab SSO login error

private PC-> no trouble

why error message?? -> the system admin has turned off OAuth2 Service Provider ??

help me ~~