Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'wpss_social_addtoany_js'

Question

I have made an update of the plugins and themes and now it throws me this warning.

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'wpss_social_addtoany_js' not found or invalid function name in /home/html/wp-includes/class-wp-hook.php on line 286

Answer 1

Ok, so you’ve updated the plugins and themes and the error shows up.

This error means that you try to use function that no longer is defined.

Most probably it was defined in a plugin and the newer version changed its API. And your theme (or some other plugin) is still using the old API.

So how to fix that?

• Download your code.
• Search for occurrence of that function call and locate all of them.
• If they’re located in your own code, modify it to use current API.
• If they’re in third party code - notify their authors and wait for fixes or stop using them.