[Plugin: The Events Calendar] Events not showing at all…

I am having this same problem – my main calendar still shows, with all events on the correct date, but if I click on an event it will not pull up (I get a 404 error). I added a new event and can’t get it to pull either.

I’m also using a child theme…. I wonder if that is related….

Make sure to flush your permalinks at Settings > Permalinks…