Hi NemoPS
I have the same problem when trying to hide some fields. Appears the Technical error with the same message when trying to register from oneclickcheckout.
I removed all my changes but the error still there.
I look to the network tab and find this:
Failed to load resource: the server responded with a status of 500 () https://minimalstudioshop.com/es/quick-order?rand=1468953093196
Uncaught TypeError: Cannot read property 'hasError' of null jquery-1.11.0.min.js:4
I don't know what I have to do.
Thank you in advanced.