PayPal page displaying 'Things don't appear to be working at the moment' error after submitting the form

I have just set up my first shirt order form, attached to my PayPal account, but when I click submit, I get the following error:

(PayPal logo) Things don't appear to be working at the moment. Please try again later.

Is there a better way to accept payments and/or a different service I should set up with?

Thanks for any advice/links for more info/etc.

I have checked your JotForm http://www.jotform.us/form/80314240584147 and when I tried to submit, it is redirecting to PayPal without any issue. If you are still experiencing any issue with the form or with a different form, please let us know. We will be happy to take a look again.

Thank you!