I am using the Relevanssi – A Better Search plugin for a client. I have discovered when I do a search for the term “timeline” I get this error.
Warning: call_user_func_array() expects parameter 1 to be a valid callback, second array member is not a valid method in /XXX/wp-includes/class-wp-hook.php on line 286
So far I can not get the error when searching for other words. Only “timeline”.
Does anyone know how to resolve this issues?