Dynamo Cannot use in Revit 2022

Hi All,

I am using Revit 2022, i cannot use Dynamo as attached image.
how can i fix this?

Sign of a DLL conflict.

Disable all of your Revit add-ins, and see if that fixes it. If so we can narrow it down to one of the add-ins by enabling them in small groups until you find the conflict.

If that doesn’t fix it, disable all of your Dynamo packages and customizations and see if that fixes it. If so re-enable Revit add ins, and add the packages back on small groups.

Thanks your reply. I don’t know why I cannot find Manage Packages button in Dynamo.

Under preferences I believe.