This is so screwy. I tried multiple internet browsers from my desktop and nothing worked. I tried using my cell phone and that didn't work either. Yet the agent at the castle said he could see it and made sure he was not using the company's agent software. He went straight to google chrome.
I finally called Dell. I paid separately for hardware and software assistance when I bought my new PC. This service has helped me several times on different issues (mostly me not understanding something.) in the past..
The technical agent couldn't figure it out either for awhile but eventually figured out if you let it "auto load" (some of my information is apparently held in the background, like phone number, country. email, name and address etc.). the United States showed up as an option as did United Arab Emirates. Go figure. So, there must be some bug in the castle's web site that doesn't allow it to work perfectly. I must have spent 90 minutes and a phone call to Portugal and to Dell to buy € 26 worth of tickets. I understand lines can be long when buying on site. But probably not 90 minutes.
I'm not sure I can duplicate how we got it to work but I have my tickets now.