Opening the System Console and saving a change will upgrade your config.json schema to the latest version using default values for any new settings added.
When I change something, the changes are not saved (I clicked on the blue save button).
Yes I’ve followed that tutorial. Sorry the link I’ve posted was the wrong one, so it was misleading.
As a matter of fact, I’ve added my comments to this guide in here
for some reason, this feels like a permissions issue to me. do you run the MM server as root or do you have another account that it runs as? if it runs as another account, try doing a chown then chmod 755 to the mattermost server account on config.json.
After this, mattermost (which is also the system user who runs mattermost) could not change the config file.
With “sudo chown -c mattermost:mattermost /opt/bitnami/apps/mattermost/server/config/config.json” I could fix this issue.