Site preview is a tool provided by SW-Soft in Plesk to view the websites before domain propagation. Using this function a User can test the scripts he/she has uploaded.

Sometime it happens that while trying to access Site Preview it give 404 Page Not Found Error. This mainly happens when the sitepreview.dll is not properly loaded in IIS.

SOLUTION:

This problem can be fixed by adding stiepreview.dll as ISAPI Filters in IIS. To add ISAPI Filters login to the server and go to IIS > Web Sites > Properties. Then chose ISAPI Filters tab and add filter called “sitepreview” located at C:\SWSoft\Plesk\isapi\sitepreview.dll.

NOTE: “C:\SWSoft\Plesk\” Directory can be changed as per your Server Settings