[forge-dev] Error when trying to test a forge plugin in a running forge instance

Hi guys, I am trying to test the undo plugin on a working forge instance but I am getting a strange error. As described here: https://docs.jboss.org/author/display/FORGE/Make+your+Plugin+available+to... I have added the undo-plugin using 'forge source-plugin' command. It was added successfully, I can even see undo-plugin commands when I call 'list-commands'. But when I execute 'undo setup' command (should simply install the plugin), I get the following exception: The requested Facet of type [org.jboss.forge.undo.UndoFacet] could not be loaded. UndoFacet class is located in the same package as the UndoPlugin class (org.jboss.forge.undo). I also tried moving both classes into "org.jboss.forge" but that didn't help either. Does anybody have any ideas what could it be? Best Regards, Jevgeni