To use your own error pages, be sure custom error documents is selected for the domain under Setup for the domain in Plesk.
-
Create the new documents and upload either to httpdocs or to a subfolder of it such as httpdocs/error_pages.
-
In Plesk, click on Web Directories.
-
Click on the Error documents tab.
-
Click on the error you want to change the document for.
-
In the type drop down list, select URL.
-
In the Location box, enter the name of the error document with a / in front if it is under httpdocs (i.e. /someerror.html) or enter /subfoldername/someerror.html if under a subfolder. (Change subfoldername and someerror.html to the names you created)
-
Click on OK to save your changes.