For the RB to load properly, you need to have delauney2.rb in the Plugins folder...
Unfortunately that is a very old file.
It is not packaged with the affected ZIP.
It is also no longer available at the crai-Depot...
Here's a copy from my archives... BUT I really do recommend you remove the faulty old RB, and get one of the better/newer Volume tools - see the PluginStore or EWHouse...
delauney2.rb