Error E0BB0061 in Norton Ghost 15.0

I have Ghost 15.0.1.36526. I run backup weekly, it worked fine till now, however it doesn't work anymore: every time when I try to run it I get error message after a few second:

 

-Error E0BB0061: Win32/Win64 API [WindowsComputer::MakeSnapVolumeWriteable] DeviceIoControl( FSCTL_LOCK_VOLUME, \\?\SymantecSnapshot0 ) failed.
--Error EBAB03F1: Access denied.

(UMI:V-0-187-97)

 

 

I tried to rucn chkdsk on my disks (I read this suggestion in another topic) but it didn't solve the problem.

 

What is the solution?

 

Thank you in advance