Unit testing on ArcGIS Pro 2.8 Add-In throws error: Unable to load ArcGIS.DeskTop.Framework.

BobTaylor

After upgrading ArcGIS Pro from 2.7.3 to 2.8.0 my unit test are now failing with an unable to load ArcGIS.DeskTop.Framework error when it tries to load the assembly for ArcGIS.Desktop.Framework.Threading.Tasks. My class constructor creates a CancelableProgressorSource object. This worked fine in 2.7. Any suggestions? 

CharlesMacleod

I think this might be related to this problem: https://support.esri.com/en/Technical-Article/000025544 

can u check your build setting and make sure it is x64 (and not AnyCPU)