When your website is developed using ASP and ASP.Net framework, it’s recommended to host your website on a windows server which is powered by the Plesk control panel. This control panel allows users to change the host side settings accordingly to their website needs. By default, your user account on the windows server (Plesk installed) may not support with classic ASP. Thus, any classic asp scripts i.e example.asp will not produce its actual output, rather than proper output it would create issues like 404 not found the error or other compatible error. The following instructions will help you to enable classic support in Plesk panel.
Step 1: Login to your customer panel and click on the respective Domain
Step 3: Once you navigate through “Hosting settings”, scroll down the page and check for the “Microsoft ASP support” option under “Web scripting and statistics” section.
Step 4: Now “Apply” the changes made and click on the “Ok” button to complete the process.