J-BusinessDirectory - "JQuery Problem" popup when redirecting to PayPal

When the user wants to upgrade a package, the choice of Paypal is selected. Then comes the redirect to the Paypal invoice to pay. However, before the redirect completes, a popup message appears saying "JQuery problem".

When you click "ok", you goto Paypal and there is no problem.

Has anyone seen this before? I saw no errors in the console.

Hi,

Can your provide your site address to check this?