# Linux app can't sign in

**URL:** <https://forum.mattermost.com/t/linux-app-cant-sign-in/22330>\
**Category:** Troubleshooting\
**Created:** [January 22, 2025, 6:55am UTC](https://forum.mattermost.com/t/linux-app-cant-sign-in/22330 "2025-01-22T06:55:07Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![sherlock\_pipe](https://avatars.discourse-cdn.com/v4/letter/s/e480ec/32.png) [@sherlock\_pipe](https://forum.mattermost.com/u/sherlock_pipe)\
**Post date:** [January 22, 2025, 6:55am UTC](https://forum.mattermost.com/t/linux-app-cant-sign-in/22330/1 "2025-01-22T06:55:07Z")

</div>

**Summary**  
Once I sign in with SSO (via Gitlab) in browser, no prompt appear to open the app and so it can’t receive the token and stays in the “awaiting token” page forever.

**Steps to reproduce**  
Use:  
Mattermost Linux tarball : mattermost-desktop-5.10.2-linux-x64  
(but same on all the options, including the official tarball and the unofficial AppImage and unofficial RPM too)  
Chrome : 132, same with Firefox 134.0  
OS : Fedora 41 Workstation Kernel : Linux 6.12.9-200.fc41.x86\_64  
Gnome 47 on Wayland

**Expected behavior**  
A prompt to launch/open Mattermost desktop appears in the browser, once clicked on Open, Matermost is logged in and can be used.

**Observed behavior**  
No prompt appears in the browser to open the app and so it can’t receive the token and stays in the “awaiting token” page forever. It’s possible the app isn’t ‘registering’ an URL handler for mattermost:// URLs, which should redirect and open the desktop app.  
Is it there a manual workaround I can try?

Note that [Zoom.us](http://Zoom.us) uses the same SSO sign in method, and it works perfectly.