@gunu
@caum
My problem being caused by iThemes Security Plugin. After I disable it plugin start working.
Thanks
Andrew
Hi,
Similar problem after upgrading to 3.4.2
Any ideas?
Thanks
Andrew
The same problem appears after installing plugin: WooCommerce Table Rate Shipping Version 2.5.1. I’m use WooCommerce Version 2.1.7.
Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'woocommerce_admin_css' was given in /home1/raven/public_html/shop/wp-includes/plugin.php on line 470