Error connecting to Mattermost 5.37.3 on Windows XP

Troubleshooting
1

Summary
After upgrading from 4.4.5 (via 5.33) to 5.37.3, Mattermost hangs when loading. Only the loading screen with the 3 dots is displayed.

Steps to reproduce
Mattermost Server 5.37.3
Firefox 52.4.0 on Windows XP
Calling the normal URL of the Mattermost Server → Stuck

Newer PCs (and the Android app) have no problems.

I know that Windows XP is very old. But that’s why we use Mattermost for internal communication. The PCs do not connect to the Internet.

2

Windows XP has not been supported since 2014.

You would have to go back to your previous version if you want to continue using windows xp.