[Solved] Form gets stuck on Validating

[BodgeIT]

I've tried everything on this, I'm not getting any console errors that I can see.
I'm pretty sure that all elements of form are available in ACL.
I've disabled validations for elements but form still gets stuck.
I've disabled many other JS on this page to see if there is interference.
I've tried it rendered through Protostar.

Any help or suggestions would be great, client jumping up and down on my fingers..

Joomla 3.8.8
Fabrik 3.8.1 + (download from Github 21/06/18)
PHP 7.1

 

[BodgeIT]

This was working until either 3.8.0 or 3.8.1 update I think.
I've withheld url deliberately, can pm it.

 

[troester]

Have a look in your browser's console in the "Network" tab.
The response probably will show an error message (and not the expected JSON string).

 

[BodgeIT]

I'm learning!
I turned on Fabrik debug and now get this error when submitting form to nav to next page:
jquery.min.js?7f94fa22fb00214d4d05e23447cccb3b:4 POST https://dev.sitenamechanged.org.uk/...&format=raw&task=form.ajax_validate&form_id=9 500 (Internal Server Error)
send @ jquery.min.js?7f94fa22fb00214d4d05e23447cccb3b:4
ajax @ jquery.min.js?7f94fa22fb00214d4d05e23447cccb3b:4
_doPageNav @ form.js:3
e.extend.$owner @ mootools-core.js?7f94fa22fb00214d4d05e23447cccb3b:38
(anonymous) @ form.js:3
dispatch @ jquery.min.js?7f94fa22fb00214d4d05e23447cccb3b:3
r.handle @ jquery.min.js?7f94fa22fb00214d4d05e23447cccb3b:3

I know 500 error could be anything, could someone help me diagnose the info in this error further?

** update
First thing I notcie is that the url that the form is posting to is incorrect:
https://dev.sitenamechanged.org.uk/...&format=raw&task=form.ajax_validate&form_id=9

somewhere the /diagnostics/ is being added.

 

[BodgeIT]

Aha, sorry @troester, I had missed your message.
Nice tip, thanks.

The error being thrown is:
0 syntax error, unexpected '>', expecting end of file

Now, Iwonder which of 46k files it might be ;-)

?: Do you think the /diagnostics/ addition to the url is a red herring?

 

[BodgeIT]

@troester I found my issue!
Took a while but someone had added "" around a word in the validation tip text of the calc elements on the form.