nitropack clash with Events Calendar

I ‘d like to use Nitropack, and it seemed to work, but when I added a new event in the Events Calendar, it didn’t show on the website. Then I deactivated Nitropack, added the event and activated Nitropack again, which worked initially, but now this doesn’t work anymore. Is there a solution?

I use Events Calender in combination with Events Shortcodes for the Events Calendar.

The page I need help with: [log in to see the link]