This error message started to appear with latest builds of Multiverse - Core / Portals from jenkins. I do not use WorldEdit, so i guess this is the cause of the error.

[12:23:32] [Server thread/ERROR]: [Multiverse-Portals] Plugin Multiverse-Portals v2.5-b722 has failed to register events for class com.onarandombox.MultiversePortals.WorldEditConnection because com/sk89q/worldedit/bukkit/WorldEditPlugin does not exist.

I'll get this fixed tonight or tomorrow. Thanks for testing the new build.