"Undefined" error on login/logout in jquery mobile

Hi there,

In the mobile version of my site (only an issue in mobile version), using jquery mobile, when logging in or logging out, the submit returns a blank page with the message “Undefined” on the page, and nothing else.

This happens whether the login was successful or not.

• EE Version/Build: 2.5.2 - Build Date: 20120606

• Other Addons:

Polls Accessible Captcha
BW Required Category
CP Analytics
Custom System Messages Forms (*by DevDemon - this is the module generating the form in question)
Freebie Freeform Low Reorder
Low Seg2Cat
Matrix NSM .htaccess Generator
P&T Field Pack
SafeCracker
SnippetsSync
Structure

I have disabled ajax for forms, I’ve tried both methods, and neither helps:

$(document).ready(function() {
 // disable ajax
 $.mobile.ajaxLinksEnabled = false;
 });

$(document).bind('mobileinit', function() { 
 $.mobile.ajaxEnabled = false; 
 });

Has anyone else run into this or have any pointers?

Any help is much appreciated!

Thank you 😊