Symptoms

The following error is shown while accessing Backup Manager for domain:

PHP Warning: getimagesize(%plesk_dir%admin/htdocs/theme/icons/16/plesk/): failed to open stream: No such file or directory
Line: 873
File: "%plesk_dir%"\\admin\\plib\\HTML.php
Stack Trace:
....

Cause

The issue was considered as internal software issue with ID PPPM-855 . The error occurs on the servers with large number of domains only. The issue was completely fixed in Plesk 12 version

Resolution

There are 2 possible solutions:

1. Turn off display_errors option in file %plesk_dir%admin\\php.ini :

   display_errors=Off
   

2. Find and rename backup directory for that domain. By default, backup directory is %plesk_dir%Backup . The directory for renaming would like following:

   %plesk_dir%Backup\\resellers\\reseller_name\\clients\\client_name\\domains\\mydomain.com