Fastpath clustering

I am playing a little with mesos and launching tasks of openfire with the same configuration files having clustering enabled. (You can see the nodes in the clustering overview)

However if I click fastpath from the menu of the latest launched node, I get

"Corrupted Content Error

The site at http://192.168.122.249:9090/plugins/fastpath/workgroup-summary.jsp has experienced a network protocol violation that cannot be repaired.

The page you are trying to view cannot be shown because an error in the data transmission was detected.

Please contact the website owners to inform them of this problem."

I am only now testing with two tasks, so I do not know if a third is behaving differently. On the first node the menu is working properly