Has SketchUp Pro 2018 lost Geolocation like it has 3d warehouse sketchup model format.
I don’t think there is a relation about the Geolocation and the 2018 format removed from 3D warehouse.
Try to sign out from SU then close SU, restart your computer start SU then sign in again. (Sign in/out option is located in the Help menu.)
If that does not helps, try this:
then repeat the sign out/in procedure above.