Also, I just found the error:
In the GD permalinks, I wanted to use a custom structure to better reflect the content of our directory.
This caused the above mentioned error. When I set the permalink structure for GD back to default the error went away.
I’ll play with it some more to see if I can figure out what makes it pop out that error, but for now default permalinks will work just fine.
Best,
RVtravel.com