@MattMattV Does the issue reproduce for any other System Console settings, or only for Link Previews?
Also, which of the two Mattermost versions did you install:
- Team Edition: https://releases.mattermost.com/3.7.2/mattermost-team-3.7.2-linux-amd64.tar.gz
- Enterprise Edition: https://releases.mattermost.com/3.7.2/mattermost-3.7.2-linux-amd64.tar.gz