Hi John,
I’m sorry that you’re running into this issue, but I’ll be happy to help you out.
First, I see that you’re running a version of WordPress that is quite a bit older – can you try updating to the current version (4.9.8) and see if that gets the email working? I would highly recommend making a full backup of your site and doing this update first in your testing environment, just to be on the safe side.
You’ll also want to check what you have selected for “When should attendee records be generated?” and “When should tickets be emailed to customers?” under Events > Settings > Tickets > WooCommerce Support. If the order is not reaching the status that you have set there, the email will not be sent until that happens. Are the attendee records being generated even though the email isn’t being sent?
If you haven’t done so already, you’ll also want to check your spam folder to make sure that the email didn’t end up there 🙂
Thanks,
Jennifer