For one of our project wich is a old one convert to Revit 2019, we have an error on exportation.
Cannot export the active 3D view:
The color represents an invalid or uninitialized color.
Test with different camera view.
I don’t know if you can make something to avoid this error on export.
It’s not critic for this project, but perhaps the convertion of old project will have the same problem for other user.