Hi, Ive just upgraded to WooCommerce 3.0 and since doing so my site no longer appears to be able to process orders as whenever I click on the Proceed to Paypal it eventually just returns an “Internal Server Error”. If I switch the theme back to Twenty Sixteen then the page and button work fine.
We haven’t received any other reports of that – GP simply adds the required markup to WooCommerce pages, nothing else.
You’ll need to check your error_log file for a specific error, or ask your hosting to check for you. It will tell you exactly what’s causing the internal server error.