Mirroring repositories

Hello,
I can not perform repository mirroring, I configured both ssh and password all the same error:

13:close stream to gitaly-ruby: rpc error: code = Unknown desc = Gitlab::Git::RepositoryMirroring::RemoteError: Permission denied, please try again. Permission denied, please try again. Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password). fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists.

Thanks in advance.