Is giving this error when accessing the system after installation:
OS: Windows 2012 R2
I hit the same problem. I believed somehow IIS lost registration of MVC framework. Redo the registration by:
Windows 8+ / Windows Server 2012+ - Windows Features: IIS -> WWWS -> Application Development Features -> ASP.NET 4.5.
Other - Run
%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -ir
with administrator privileges