Howdy Caleb,
I would love to help you with this.
Just to confirm, is this the guide you have already tried following: Troubleshooting 404 Page Not Found error ? The first step in there, flushing permalinks, is by far the most crucial step when diagnosing issues like this so it is key to make sure you’ve tried that.
One other thing to try that’s not mentioned in the guide is to double check your settings in WP-Admin > Events > Settings > Display . Make sure that all of the Views that you want shown are enabled, such as List, Month view, etc. Then go down and hit save regardless of whether they were enabled or not. Does that fix it? If not, would you mind flushing your permalinks once more by following that guide? They do not always automatically get flushed, and so sometime you have to manually flush after changing settings like this.
Cheers!
– Brook