Trying and failing to purchase Midi Guitar

Hi, I’m trying to pay for Midi Guitar with Paypal. I get as far as the “complete order” button. When I click that, the page just reloads, no error, but does not get any further. Most frustrating. Please advise. I am buying from the UK.

I just tried again. I got exactly the same, after authenticating the purchase in PayPal, I get an error which says
“The VAT ID entered is incorrect, or does not match the country you selected (GB). Only corporate customers based in the EU who use the VAT ID for payment processing within the EU are required to enter a value. If this does not apply to you, or you are an individual, leave the VAT ID field empty. For VAT ID format questions, contact questionacharge.com.

  1. We have estimated your order total as £139.24 based on recent exchange rates. Your actual payment will be submitted as US$179.94”
    Then it just returns to the “Complete Order” screen