Yes I know, I’m late in the game 
I moved Mattermost 5.33.3 to a new server and started making the updates using the ESR-versions.
Lost team- and profile-images with 5.37.10, but I can reset them.
Update to 6.3. went well, but I lost all images with 7.1.
divs have correct height, but are completely empty.
Did set the user rights as before
sudo chown -R mattermost:mattermost /opt/mattermost
Don’t see any errors in the console but pdat.matterlytics.com/v1/… failing because of Cross-Origin and this one:
com.mattermost.calls: TypeError: can’t access property “length”, i.data is null
Had anyone the same/similar problem?