In the past, I've been able to successfully get GitLab repository mirroring to my own server working.

Now it's not longer working. I'm trying to fix it but am stuck on the error GitLab shows to me:

13:get remote references:
create git ls-remote: exit status 128, stderr:
ssh connect to host XXX: Connection timed out
fatal: Could not read from remote repository.

Please make sure you have the correct access rights and the repository exists.

Steps taken:

• Add new on GitLab "Mirroring repositories" section (using the settings: mirror direction push, Detect host keys, authentication method SSH public key, entered the username in the username field)
• Added the public key GitLab provides for this new entry to the authorized_keys file on my server

I'm using GitLab (.html)