I have encountered a problem with Visual Studio giving me this error:
An unhandled exception of type 'System.NullReferenceException' occurred in ArcGIS.Desktop.Framework.dll
Object reference not set to an instance of an object.
I am working in ArcGIS Pro 2.3.3 using ArcGIS Pro SDK 2.3
I am just trying to build a basic button from the tutorial like this one:
I download the solution to build it and I get that error.
However I can build the .NET projects:
Has anyone seen this error? I cannot build any ArcGIS Pro addins right now.