Hey Chris. Thanks for the note here, and sorry to hear you’re having issues. This is an interesting issue, and one that I’m weirdly unable to recreate. Do you have 2.0.7 of both The Events Calendar and Events Calendar PRO? Can you confirm your permalink structure and whether this issue persists after re-saving permalinks?
Figured it out. The plugin, WordPress SEO by Yoast, has a setting “Redirect ugly URL’s to clean permalinks.” Once unchecked, the events calendar is displayed.