Incompatible with other WordPress Themes

The function named "make_sortable" is incompatible with other WordPress
themes but works great for WooCommerce themes. I tracked the problem to
lines 58, the word "sortable" throws an error. Perhaps its the jQuery
and $ conflicting.
Sortable changes does not save

using the sortable function from the js, it sorts very well and ok but
after clicking the "save changes" button, to update everything, it does
not update instead reverts back to its previous state.
Description of the plugin