Unable to restart Mattermost (Docker)

Troubleshooting
1

I have a docker-compose.yml for Mattermost that has been running for a year. Suddenly today, when I restarted the container, I run into the following issues:

{"timestamp":"2025-07-17 17:32:58.500 -07:00","level":"error","msg":"An error occurred while initializing Access Control","caller":"app/channels.go:149","error":"Init: Unable to initialize access control service., enterprise advanced license required"}

Nothing change on the server in terms of architecture. I noticed that it’s now saying “enterprise advanced license required” even though before, this image was free to use (even though some features are behind paywall).

Is there something changes to the license? If so, how can I safely migrate everything to team edition?

Thank you.

2

Thanks for reaching out, Huy! It looks like recent Mattermost Docker images now enforce license checks more strictly, which could explain the “enterprise advanced license required” message. To safely revert to the free Team Edition, you can follow the steps to remove the Enterprise license here: How to downgrade from Enterprise to Mattermost Team Edition