I have Magento CE 184.108.40.206, and when I try to check out with ONLY downloadable and/or virtual products, my onepage checkout won't move past the billing information step. Clicking the continue button causes the text loading next step to appear for a moment, then the button comes back and no progress has been made.
Uncaught TypeError: Cannot read property
getElementsByTagName of null
and every time I click "continue", i get this in the console:
XHR finished loading: POST
document.getElementById("shipping-buttons-container").getElementsByTagName("button").onclick = qas_first_pass_shipping;
Though i don't know where this code is located in my site's source.
I have tried numerous solutions to similar questions I have found on this site (and others) but none have worked. Any help would be greatly appreciated.