Jerome,
I’m sorry to hear that you are having issues with your site. I took a look and there are javascript errors in the console, not related to the events plugin.
Try switching to the Twenty Seventeen theme and disable all other plugins and see if the issue still persists. You can read more about troubleshooting plugin and theme issues in our Testing for Conflicts guide. Even if the problem is not related to one of our plugins, you can isolate the issue by disabling all plugins and re-enable them one at a time until the problem re-appears.
Let me know if that helps!
Thanks,
Sky