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Unable to create a new domain or save hosting settings in Plesk: Unable to turn on ASP.NET version 4.x because it is not installed

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Kuzma Ivanov
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Applicable to:

  • Plesk for Windows

Symptoms

When creating a new domain or updating domain's hosting settings, the operation fails with:

PLESK_ERROR: Error: Unable to turn on ASP.NET version 4.x because it is not installed.

Cause

ASP.NET 4.x version is not listed in Plesk components. This error may occur when a higher version of ASP.NET was installed previously, but was removed later.

Resolution

  1. Log in to Plesk GUI

  2. Go to Tools & Settings > Server Components > Click on Refresh

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