You must install ASP for IIS as this link:

In Control Panel, click Programs and Features, and then click Turn Windows Features on or off. Expand Internet Information Services, then World Wide Web Services, then Application Development Features. Select ASP, and then click OK.

Then you can see ASP in IIS websites.

In IIS 8.5 or 10, select your project, you can see the options in the right hand side. In that under the IIS, you can see the ASP option.

Navigate away from the option, in the right hand side top you can see the Actions menu, Select Apply. It solved my problem.