Dynamo for Revit 2020 Background Preview not available

How can i fix this issue?
I have Revit 2020.2 with Dynamo Revit instaled.
DirectX 12 (DxDiag 10.00.19041.0546)
GTX 960 GPU with latest drivers instaled
Procesor is i5 10600K with Intel UHD Graphics 630
I have instaled DirectX End-User Runtimes (June 2010) from Download DirectX End-User Runtimes (June 2010) from Official Microsoft Download Center
In Nvidia control panel i forced Revit to run on Nvidia GPU.

And still no background preview available.
I also instaled Revit 2021 to check if it will work on this version of Revit but still background preview is not working.