CONNECT U16 and Civil 3D Objects

Hello,

Using CONNECT U16 (10.16.00.80) with Object Enabler Civil 3D 2022.1 (13.4.1339.0) and still seeing boxes where civil objects should be:

I read about Real DWG needing to be the same version, but I believe that RealDWG 2022 is included in the U16 and not a separate install.
Not sure what version of C3D was used to create these objects.
Update - also tested with U17 same problem.
Any suggestions?

Thanks,

Tom F .