I followed the Gitlab project setup guide, but all the builds fail because CircleCI says my SSH key is invalid:
Using SSH Config Dir '/home/circleci/.ssh'
git version 2.25.1
Cloning git repository
Cloning into '.'...
Warning: Permanently added the ECDSA host key for IP address '' to the list of known hosts.
Load key "/home/circleci/.ssh/id_rsa": invalid format
git@gitlab.com: Permission denied (publickey).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
exit status 128
I didn't add a new SSH key, so it's just using the default CircleCI SSH key that's supposed to have access to the Gitlab repo. When I SSH into CircleCI to check the build, it shows that the SSH key is just an empty file:
circleci@0889e6f9737d:~$ cat /home/circleci/.ssh/id_rsa