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ArcGIS SDK project won't build add-ins

Question asked by PNWGIS on Jun 19, 2019
Latest reply on Jun 20, 2019 by PNWGIS

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:

 

https://developers.arcgis.com/labs/pro/build-your-first-add-in/

 

I download the solution to build it and I get that error.

 

However I can build the .NET projects:

 

https://developers.arcgis.com/labs/net/add-layers-to-a-map/

 

Has anyone seen this error? I cannot build any ArcGIS Pro addins right now.

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