Before I can assist you further on this, can you please share the article / documentation that you referred to when installing Mattermost on your Ubuntu server? Is it this one - Windows WSL based on the make run-server command that you are trying to run?
The error that we are seeing on the terminal complains about nc: bad address openldap, can we check what is being shown in the docker logs to see if there is more details as to why the issue is occurring? I am guessing a misconfiguration but I can’t tell until we get more information from the log. Thanks.
I am using AWS Ubuntu 18.04.4 LTS (GNU/Linux 4.15.0-1065-aws x86_64) and trying to “run make run-server”
Below is the log i am getting from docker for openldap container.