Good evening Ross and welcome back!
Thank you for reaching out to us.
We are sorry to hear about the 404 message you have been getting.
I would love to help you with this topic.
I assume you already went through the following: https://theeventscalendar.com/knowledgebase/fixing-http-404-errors/
Here are a couple of other ideas to try:
- Head over to Events -> Settings -> General and re-saving the settings (helps to change the slug just for fun). Re-save the permalinks after
- Please upgrade the Events Calendar Pro to its latest version 4.4.15
- Try temporarily reverting back to a default WordPress theme such as twenty-sixteen
Let me know how that goes.
Best regards,
Geoff B.