Published by exdone
Posted on April 23, 2011
Error: Plesk 9.x for Windows Fatal error: Call to undefined function of_get_key_by_product() in C:\Program Files\Parallels\Plesk\admin\plib\common_func.php3 on line 4501
Solution: The error is being caused by the registry.xml being empty zero bytes. The file is normally located in C:\Program Files\Parallels\Plesk\admin\repository
Pretty much what you need to do is remove this file and then restart Plesk.