Messaging plugin - admin inaccessible

Hello,

I just updated the Messaging and Communities plugins. The Communities plugin seems to be working fine, but Messaging causes the Admin area to disappear. The front of the site looks fine, but when I try to switch to site admin, I get a blank white page. When I delete the two elements of Messaging, it's fine again.

Seems like a plugin conflict, but it was working fine before the update.

Thanks