mushtitude

Ok, so you can try 2 things :
1) Disable only the line :
wp_deregister_script(array(‘jquery’));
and replace the wp_enqueue_script with :
wp_enqueue_script(‘jquery’, ‘https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js’);

2) Disable the 2 lines :
wp_deregister_script(array(‘jquery’));
wp_enqueue_script(‘jquery’,https://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js’);

Then, make sure jQuery is call in you webpage (I guess WordPress include it by default, or maybe your theme).
If not, include it by your own in your theme

Hi and thanks for sharing the problem.

Try to update the jQuery version with https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js in wp_enqueue_script

Hope this will help