Hello Chris,
Welcome to JEvents!
I'm so sorry to hear of your issues. That view looks like a PHP Error, can you enable Joomla! Maximum error reporting and then view again? Do you see an error at the bottom of the page?
Can you provide what version of Joomla! you are using?
We certainly hope we can! We have had many users come from DT Register of the last year.
I'm afraid at present it's PayPal Standard, we can also use Hikashop or Virtuemart for the checkout process though should you wish and we are researching an alternative payment library to use for RSVP Pro. But this is just at the research stage.
Many thanks
Tony