Deploying a Dockerfile from a private repository doesn't. The following error message is displayed and the create button remains grayed out:
"Dockerfile not detected"

I changed the repository visibility to public and it works:

I am 100% sure it is not the secret, because I have used both methods (basic-auth and ssh-key) and got the same error. I was also able to pull the code from the git using the same credentials.

This issue doesn't happen on OCP 4.8