Thank you for your messages, I am going to assign this ticket to Ashan and he will be able to take it from here and find you a solution. Please allow some time for him to get back to you, we greatly appreciate your patience and thank you for being a eventon customer!
Have you modified the plugin previously?
Whats interesting in your link is when i click on the event i can see the map shows up for a split second and then it hides. So are you certain there is no custom code you added to hide the map? Please think back and see if you can remember any modification that was done that could be causing this.