Checkout Issues

Hello there, thanks for your plug in and would like to check some issues as below:

1. After clicking “Buy This Course”, it will be directed to checkout page which is ask user to log in or register. However, when click log in or register button, nothing happens and stay at the same page. [Screenshot: SC1]

2. As Login or Register button did not work. I manually logged in and went back to “Buy This Course”. This time, checkout details appeared but “Place Order” button did not work (did not direct to Paypal Website and just staying at same page). [Screenshot: SC2]

You may see the screenshot at the link: https://we.tl/t-pWxr4PLt6A

Thank you so much for your help!

The page I need help with: [log in to see the link]