VS2017 System.Runtime.InteropServices.COMException (0x80041FEB): There is no editor available for T4MVC.tt

[sojan80]

When I try to run the tool in my Web.Mvc project I get this error:
Error Running transformation: System.Runtime.InteropServices.COMException (0x80041FEB): There is no editor available for 'C:\Projects\AppDev\Campus\UWSP.Personnel\src\Web.Mvc\T4MVC.tt'.

Make sure the application for the file type (.tt) is installed.
at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
at Microsoft.VisualStudio.ErrorHandler.ThrowOnFailure(Int32 hr)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.FileDocumentManager.Open(SimpleHierarchyNode projectItem, Boolean openWith, UInt32 editorFlags, Guid& editorType, String physicalView, Guid& logicalView, IntPtr docDataExisting, IVsWindowFrame& windowFrame, WindowFrameShowAction windowFrameAction)
at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
at Microsoft.VisualStudio.ErrorHandler.ThrowOnFailure(Int32 hr, Int32[] expectedHRFailure)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.FileDocumentManager.Open(SimpleHierarchyNode projectItem, Boolean openWith, Guid logicalView, IVsWindowFrame& frame, WindowFrameShowAction windowFrameAction)
at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProjectItem.<>c__DisplayClass55_0.b__0()
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProject.<>c__DisplayClass70_0.<b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.Threading.JoinableTask.CompleteOnCurrentThread()
at Microsoft.VisualStudio.ProjectSystem.ProjectMultiThreadedService.ExecuteSynchronously(Func1 asyncAction) at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProject.ExecuteSynchronously(Func1 asyncAction)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProjectItem.Open(String ViewKind)
at EnvDTE.ProjectItem.Open(String ViewKind)
at Microsoft.VisualStudio.TextTemplating0C38F607A00AAD8E1C017AC8FB3FAFFF668650E340FB75AF2324931BC77E1CAE8BE3F01BEF133A62B084AA5930BD22BE14360445E3A39785D4C9C7F6DDCF1522.GeneratedTextTransformation.XmlSettings.Init(ITextTemplatingEngineHost host) in C:\Projects\AppDev\Campus\UWSP.Personnel\src\Web.Mvc\T4MVC.tt:line 2578
at Microsoft.VisualStudio.TextTemplating0C38F607A00AAD8E1C017AC8FB3FAFFF668650E340FB75AF2324931BC77E1CAE8BE3F01BEF133A62B084AA5930BD22BE14360445E3A39785D4C9C7F6DDCF1522.GeneratedTextTransformation.XmlSettings.Load[T](ITextTemplatingEngineHost host) in C:\Projects\AppDev\Campus\UWSP.Personnel\src\Web.Mvc\T4MVC.tt:line 2551
at Microsoft.VisualStudio.TextTemplating0C38F607A00AAD8E1C017AC8FB3FAFFF668650E340FB75AF2324931BC77E1CAE8BE3F01BEF133A62B084AA5930BD22BE14360445E3A39785D4C9C7F6DDCF1522.GeneratedTextTransformation.MvcSettings.Load(ITextTemplatingEngineHost host) in C:\Projects\AppDev\Campus\UWSP.Personnel\src\Web.Mvc\T4MVC.tt:line 2231
at Microsoft.VisualStudio.TextTemplating0C38F607A00AAD8E1C017AC8FB3FAFFF668650E340FB75AF2324931BC77E1CAE8BE3F01BEF133A62B084AA5930BD22BE14360445E3A39785D4C9C7F6DDCF1522.GeneratedTextTransformation.TransformText() in C:\Projects\AppDev\Campus\UWSP.Personnel\src\Web.Mvc\T4MVC.tt:line 39 Web.Mvc C:\Projects\AppDev\Campus\UWSP.Personnel\src\Web.Mvc\T4MVC.tt 2578