I have this 2 huge problems, i will put 2 links show you my problems, and i will upload the images to.
In the firts image, the button "Proceed to payment" does nothing.
In the second image, a the bottom you can see the error:
Mixed Content: The page at 'https://gameassetsmarket.com/beta/sellacious
/' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'https://sellacious.com/index.php?option=com_jarvis&task=site
.register'. This request has been blocked; the content must be served over HTTPS.