I am suddenly having a new problem with my calendar; when I click on an event, it shows a 404 error. However, when I preview the event, it shows up the way it should. Any suggestions?
As a first troubleshooting step, can you try flushing your permalinks by going to Settings < Permalinks and Save Changes. You will want to clear your browser and site cache as well after doing this.
If that doesn’t resolve the issue, try running through the steps outlined in the following article: