This error comes due to one of following reasons:
- You haven’t installed ASP.NET services on your IIS server.
- You haven’t registered your .NET Framework on your IIS Server.
Solution: To solve the issue try to repair the .net framework 4[whatever you are using] and then run the command
%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe -i
or
%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -i
which is applicable on your environment.
Note: May be you need to change version [vXX.XX.XXX] as per your .NET version.
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