Null Reference Exceptiion

[d1820]

System.NullReferenceException : Object reference not set to an instance of an object.
at async CodeDocumentor.MethodCodeFixProvider.RegisterCodeFixesAsync()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at async Microsoft.CodeAnalysis.CodeFixes.CodeFixService.GetCodeFixesAsync()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at async Microsoft.CodeAnalysis.Extensions.IExtensionManagerExtensions.PerformFunctionAsyncT

CodeDocumentor: DiagnosticId: CD1600. Message: System.NullReferenceException: Object reference not set to an instance of an object. at CodeDocumentor.ClassCodeFixProvider.<>c__DisplayClass7_0.b__1() in C:\dev\CodeDocumentor\CodeDocumentor\Analyzers\Classes\ClassCodeFixProvider.cs:line 107 at CodeDocumentor.Common.TryHelper.Try(Action action, String diagnosticId, IEventLogger logger, Action`1 exceptionCallback, Boolean reThrow, Int32 eventId, Int16 category)

CodeDocumentor: DiagnosticId: CD1601. Message: System.NullReferenceException: Object reference not set to an instance of an object. at CodeDocumentor.ConstructorCodeFixProvider.<>c__DisplayClass6_0.b__1() in C:\dev\CodeDocumentor\CodeDocumentor\Analyzers\Constructors\ConstructorCodeFixProvider.cs:line 90 at CodeDocumentor.Common.TryHelper.Try(Action action, String diagnosticId, IEventLogger logger, Action`1 exceptionCallback, Boolean reThrow, Int32 eventId, Int16 category)

CodeDocumentor: DiagnosticId: CD1606. Message: System.NullReferenceException: Object reference not set to an instance of an object. at CodeDocumentor.PropertyCodeFixProvider.<>c__DisplayClass6_0.b__1() in C:\dev\CodeDocumentor\CodeDocumentor\Analyzers\Properties\PropertyCodeFixProvider.cs:line 90 at CodeDocumentor.Common.TryHelper.Try(Action action, String diagnosticId, IEventLogger logger, Action`1 exceptionCallback, Boolean reThrow, Int32 eventId, Int16 category)