Illegal XML error (23::0) on import

Getting this error when trying to import one AE project into another AE project.  I am running a PC with version 15.0.0 (build 180)

Maybe my problem is I should have stayed with CC 2017....

The error specifically stems from the use of the plug-in "RubberHose" and "RubberHose 2"  These both worked well on CC 2017

Thanks.