Custom emojis broken after upgrading from 9.11.6 -> 10.3.1

Troubleshooting
3

Hmmm okay I managed to fix this, but I’m not sure how I did it. I suspect something broke in my S3 connection, even though I thought had tested the connection.

Something in the following steps resolved the issue:

  1. Changing from S3 storage → Local file storage → back to S3 storage
  2. Fiddling with S3 connection parameters until it was green again
  3. Purging all caches within System Console
  4. Manually restarting the Mattermost service with sudo systemctl restart mattermost a couple of times
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