Unresolved nodes suddenly appeared Revit 2019 Dynamo 2.0.3

Unresolved nodes suddenly appeared Revit 2019 Dynamo 2.0.3 these were working fine just last week.
Any idea on why and how to resolve this.

You still pathed to the same place?
Has someone deleted some packages?
Has someone updated a package?

Yeah no changes…
We’re gonna try uninstall/reinstall of dynamo