I'm trying to add a private github repository to my cpanel host but this error hapens to me:

Error: (XID uaxnz3) “/usr/local/cpanel/3rdparty/bin/git” reported error code “128” when it ended: ssh: connect to host github.com port 22: Connection refused fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists.

I have added the Deploy key to private repository by the help of this guide (click here).