# Can’t make gitlab mattermost work!

**URL:** <https://forum.mattermost.com/t/can-t-make-gitlab-mattermost-work/1770>\
**Category:** Troubleshooting\
**Created:** [June 24, 2016, 2:02pm UTC](https://forum.mattermost.com/t/can-t-make-gitlab-mattermost-work/1770 "2016-06-24T14:02:11Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![xrain0610](https://avatars.discourse-cdn.com/v4/letter/x/898d66/32.png) [@xrain0610](https://forum.mattermost.com/u/xrain0610)\
**Post date:** [June 24, 2016, 2:02pm UTC](https://forum.mattermost.com/t/can-t-make-gitlab-mattermost-work/1770/1 "2016-06-24T14:02:12Z")

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Hi, I add mattermost\_external\_url ‘[http://chat.simcu.com](http://chat.simcu.com)’ , but the mattermost can’t work well , notice:{“id”:“api.context.404.app\_error”,“message”:“Sorry, we could not find the page.”,“detailed\_error”:“There doesn’t appear to be an api call for the url=‘/api/v3/oauth/gitlab/’. Typo? are you missing a team\_id or user\_id as part of the url?”,“request\_id”:“”,“status\_code”:404,“is\_oauth”:false}

i try to delete the mattermost database and data folder , but not work also

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**Author:** ![jwilander](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mattermost.com/jwilander/32/8440_2.png) [@jwilander](https://forum.mattermost.com/u/jwilander)\
**Post date:** [June 28, 2016, 12:53pm UTC](https://forum.mattermost.com/t/can-t-make-gitlab-mattermost-work/1770/2 "2016-06-28T12:53:09Z")

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Hi @xrain0610,

Are you able to load Mattermost at all? When does that error occur?

Also looking at the Mattermost log file might help you out. It should be located here on a default GitLab install `/opt/gitlab/embedded/bin/mattermost/mattermost.log`