I have found a workaround using Blue Cat Audio Patchwork as a "wrapper". It's a cheap fix. If you decide to purchase this:
1. Use the AU version of this plugin on the slave machine inside VE Pro.
2. Choose the Patchwork Synth instantiation.
3. Select the "wrapper" preset. I also save this as a "user default" so that I can skip this step in subsequent instantiations.
4. Choose the AU version of the Roland Cloud Plugin of your choice.
Roland Cloud plugins are CPU hungry. I upgraded my VEP license after years of not using it, just to offload my Roland Cloud plugins. I was mortified when I couldn't get them to work, but happy that I figured out this workaround. Hopefully this is fixed soon without the workaround.