Apparently The EssentialsGroupmanager.jar file was removed from it's normal storage location. Everywhere on the internet I can find points to the same place which no longer works. I've been searching for mirrors for a few hours and I cannot find it.
When you visit http://wiki.mc-ess.net/wiki/Downloads and click on the Download Group Manager link it just fails.
Anyone have a suggestion/tip?
Looks like they fixed it..