Hello,
I’m sorry that you’re running into this issue, but I’ll be happy to help you figure out what’s going on.
First, can you make sure that you’re running the current versions of The Events Calendar (4.6.18), Events Calendar Pro (4.4.27), and WordPress (4.9.6)? If you don’t see a prompt to update in the Plugins section of your Dashboard, you can do so manually by following these instructions. Make sure you clear out any caching that you might be doing on your site, such as via a plugin or on your server. You’ll want to clear out your browser cache as well.
If you’re still running into this issue once you’re up to date, the next step would be to run through the steps outlined here to test for any conflicts that might be occurring with your theme and other plugins. You can also check for any Javascript errors on the page by right-clicking, clicking “Inspect”, and looking in the console. If you do see any, please copy/paste them into your reply. This type of issue is commonly caused by a theme conflict, so I would recommend starting your testing there.
Please let me know what you find, and if you can share your full system info with me, that would be helpful as well.
Thanks,
Jennifer