Cannot write to custom error documents

[ChrisMK]

The title pretty much says it all. My system specifics are as follows:

PRODUCT
Plesk 10.3.1, CentOS 6.3

PROBLEM DESCRIPTION
Error message received when attempting to save any file in the error_docs folder after editing the file.

STEPS TO REPRODUCE
As above: attempt to save any file in the error_docs folder

ACTUAL RESULT
Correct save

EXPECTED RESULT

"Error: Unable to edit file //error_docs/internal_server_error.html: filemng failed: filemng: Cannot open destination file '/var/www/vhosts/mydomainname.com//error_docs/internal_server_error.html.Lbko3V'
System error 13: Permission denied"

Note the // between mydomainname.com and error_docs - that is not a typo.

Has anybody encountered the same problem, or have any suggestions. A web-search and forum search did not pull up anything helpful. I submitted a support request to Parallels but after completing a four-stage submission I was informed that my license key, from a reseller, is not associated with a support package.

Thanks for reading.

 

[IgorG]

Try to set correct permissions for vhost with help of /usr/local/psa/admin/sbin/vhostmng utility (--help option for details). Also check settings of SELinux.
And consider possibility for upgrading this very old Plesk version to latest.