UPDATE 12:34 GMT - The issue has now been resolved. We found a work-around that has re-enabled links and buttons. You may need to click back (on the browser) once to return to your site and try the button again to make the code change at our end work.
In the meantime we will be contacting PayPal to find what they changed in their code, why they changed it and why the failed to post any notifications anywhere on the web about this change. We do apologise for any inconvenience caused.
Thanks
Walt
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