Finally i found the debug-log of plesk-Panel and a more detailed error descripton :-)
[2015-09-14 20:03:30] WARN [panel] Zugriff verweigert.
[2015-09-14 20:04:17] ERR [panel] PleskPermissionDeniedException: Zugriff verweigert.
file...
too bad that I´m the only one on this planet with that problem :) (asked in 2 other forums, too with no reaction)
I wonder that there´s no logfile with a more detailed error message than "access denied"
I can access every folder through Plesk GUI File Manager - only the backup manager is the problem.
Every folder in the webspace was created by ftp software, not manual.
I tried the %plesk_cli%\repair.exe command and got "Permissions for the specified subscription were sucessfully repaired."
but...
When I try to start the backup manager,
I´m redirected to plesk startpage "websites and domains" with the error "Access denied" (even as admin).
Server is running the latest plesk version 12.0.18 Update Nr. 61 on Microsoft Windows Server 2008 R2 Service Pack 1.
Is there any logfile where I can...