Hi Derek!
I’m sorry you are having that issue. Let me help you troubleshoot that.
I can see in your submission form that the start/end time input elements are missing in the form, so this are not being sent when submitting the event.
This could be related to a theme or plugin conflict, so as a first step you should try switching to a default theme like twentyseventeen and see if it that solves it. If not, then you should go through the complete steps in this guide > https://theeventscalendar.com/knowledgebase/testing-for-conflicts/ and see what you can find in the process.
Also, when coming back, could you please share with us your system info by following this guide > https://theeventscalendar.com/knowledgebase/sharing-sys-info/ ?
Thanks,
Victor