Background: I have installed Jigoshop along with my custom theme. When I go to 'Add product' there is no featured image box showing. So I've added the code
add_theme_support( 'post-thumbnails' );
To functions.php, but the problem is still not resolved.
post-new.php?post_type=product brings up 3 errors:
Uncaught TypeError: Cannot call method 'appendChild' of null post-new.php:1112 Uncaught TypeError: Object [object Object] has no method 'datepicker' write-panels.js:119 Uncaught TypeError: Object [object Object] has no method 'select2' post-new.php:736
Also, the admin menus on the left of the page don't show any sub-menus, and when I click screen options it won't open.
I need some help in working out what is happening to cause those errors and I think that is what is causing a knock on effect to prevent featured images displaying on my admin page.
Your help/advice is much appreciated!