I started having a strange error on some pages. The website has been working fo the last 3 years with no problem. We sell IT courses and have pages for both individual and group registration. Group registration stopped working lately.
Insert any number greater than 1 and click "Avanti" (next) to simulate a group registration.
Then on the registration page click "Avanti" again. This should call a function called "checkData()" to...well, check the data in the form.
If you use inspector/devloper tools you will see an error
"ReferenceError: checkData is not defined"
But the checkData is in the page. Why this behaviour or conflict?