From what I see, this is RhodeCode that you are using, not HgLab, so I
cannot really help you out. If you want a reasonably educated guess, I
think it's either your connection broke right in the middle of doing a
clone operation, or server-side repository somehow got corrupted. If you
have access to the server hosting RhodeCode, try running "hg verify" on the
repository you are cloning to see if there are any errors.