- Plesk 11.x for Windows
The following error is shown while trying to update domain's hosting settings:
Error: Unable to turn on ASP.NET version 4.0 because it is not installed.
ASP.NET 4.0 is installed.
ASP.NET 4.0 version is not listed in Plesk components.
Go to Tools & Settings > Server Components and make sure that required version of ASP.NET is listed.
Press Refresh if not.
Note : This error may occur when higher version of ASP.NET was installed previously but was removed.