Geographical map not working after ver 24 upgrade

I upgraded from 21 to 24 (Centos 7)
Unfortunately http://server:8980/opennms/node-maps does not have any nodes ( or alerts) on it
Using firefox console I noticed the following :
com.vaadin.client.communication.MessageHandler SEVERE: Error sending state change events Exception caught: undefined at Unknown.ih( line 9 > scriptElement)

I did delete /opt/opennms/data and I am using latitude/longitude to avoid geodecoder issues

Any help will be greatly appreciated