Hi, hi, there is no menu gitlab

GitHub Updater v 6.2.2.13
The submenus are dynamic and only present if a plugin/theme with the appropriate header is preset.
Do you have a repo hosted on GitLab installed?
yes privat repo/ Install theme, not menu gitlab

You are missing the colon from the header GitLab Theme URI:
Most helpful comment
You are missing the colon from the header
GitLab Theme URI: