Wordpress 4.7 call_user_func_array()


Staff member
Updated to WordPress 4.7, and am receiving this error when I have one of my custom-made plugins enabled:

( ! ) Warning: call_user_func_array() expects parameter 1 to be a valid callback, no array or string given in /home/vagrant/Sites/wordpress/wp includes/class-wp-hook.php on line 298

I also get this with my debugging enabled: <a href=" " rel="nofollow noreferrer"><img src=" " alt="enter image description here"></a>

I am uncertain as to what the issue is, as the stack trace seems rather cryptic. Any advice on what may have broken the plugin, or how to diagnose the problem?