I have just installed GitLab.
I created a project called project-x.
I have created few users and assigned it to the project.
Now I tried to clone:
You may usually if you have multiple keys setup via ssh on your system (my device is running Windows 10), you will encounter this issue, the fix is to:
Precondition: Setup up your SSH Keys as indicated by GitLab
Please note, there is a space before the second line, very important to avoid this solution not working.