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.