Payment button link goes to generic error page in Paypal Checkout

[mosaic-collage]

Hi everyone,

I run a not-for-profit staff yoga club at the University where I work and I want to use Paypal buttons on our webpage to take club payments.

I have set up a button in Paypal with an inventory limit, generated the code and created buttons with links in my website. The button looks fine and has a live link with the correct product ID in it. However, if I click on the button, instead of the check-out page it takes me to a generic Paypal error page saying "Things don't appear to be working at the moment. Please try again later."

Error message URL is https://www.paypal.com/webapps/shoppingcart/error?flowlogging_id=c3a395c7c8f9e&code=GENERIC_ERROR&mf...

I can't understand what I've done wrong.   Can anyone help?

Thank you

Sarah