Good afternoon Matthew and welcome back!
Thank you for reaching out to us.
We are sorry to hear about the odd message received while purchasing Event Tickets Plus.
I would love to help you with this topic.
On my end it does look like your purchase went through via Stripe. So I am not exactly sure what happened there. But it should all be good now.
Can you confirm ?
Out of curiosity, did you use Paypal or Stripe for payment purposes when you received that message ?
Have a good weekend,
Geoff B.