What OS platform and version are you running?
This is your first clone attempt? or this was working for you at some point?
Are you cloning to the same host or another?
Having the sd-trace.log for the snap connect would be useful. For that matter, a snapdrive.dc and smo operation dump for the clone attempt is best.
If you can open a support case and upload those logs to it, let me know the case number.