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Uncaught TypeError: Object opc-billing has no method 'querySelectorAll' prototype.js:3299
(anonymous function) prototype.js:299
as you can see it is a clear js conflict and probably needs throwing JQuery no-conflict somewhere ( I just don't know where that is).
I need this resolved ASAP, so I need someone who knows what he/she is doing and can get it done swiftly.