3D preivew is missing from Revit 2020.2 Dynamo 2.3

I do not why but I got Revit 2020.2 with Dynamo 2.3.0 and I am missing 3D preview. I can see Grid so it is not graphic card issue.
Any help will be appreciated.

I just realized I can see a preview in Revit, just missing preview in Dynamo

Is there any way to re-install dynamo for Revit 2020.2?
Not sure how to solve my problem? and why I can not see preview…

Hi @Michal_Dengusiak can you try installing https://www.microsoft.com/en-us/download/details.aspx?id=8109

@Michael_Kirschner2 thanks a lot fore reply,
DirectX installed

but still missing preview,

I just downloaded DynamoCoreRuntime2.4.0

when I open I can see the preview but not grid

I can see a default is integrated card

when I change to NVIDIA is correct

is there any control of Dynamo Revit? hmmm