Problem about backup

[satit]

when i login as domain administrator and use backup
it show error message

Error in BackupState.doActivityRunner()
Traceback (most recent call last):
File "/usr/local/psa/admin/share/agent_runner/agent_runner.py", line 95, in doActivityRunner
newState = self.doActivity()
File "/usr/local/psa/admin/share/agent_runner/agent_runner.py", line 359, in doActivity
errtxt = runAgent(self, self.session)
File "/usr/local/psa/admin/share/agent_runner/agent_runner.py", line 229, in runAgent
cmd.spawn()
File "/usr/local/psa/admin/lib/python/subproc.py", line 217, in spawn
proc.run()
File "/usr/local/psa/admin/lib/python/subproc.py", line 174, in run
BaseSubprocess.run(self)
File "/usr/local/psa/admin/lib/python/subproc.py", line 158, in run
self.wait()
File "/usr/local/psa/admin/lib/python/subproc.py", line 178, in wait
BaseSubprocess.wait(self)
File "/usr/local/psa/admin/lib/python/subproc.py", line 168, in wait
raise NonzeroExitException(self, os.WEXITSTATUS(status))
NonzeroExitException: <unprintable instance object

anyone can help me?

 

[oztec]

I also have this problem. It's only for one domain.
8.0.1 FC2
I can backup and restore for other domains OK.
This domain is on an exclusive IP, and is not large in size.
I've contracted plesk support about it.