I am getting below error when try to save modified data for author/user on my blog.
Warning: call_user_func_array() expects parameter 1 to be a valid callback, invalid function name in /wp-includes/plugin.php on line 496
Warning: Cannot modify header information - headers already sent by (output started at /wp-includes/plugin.php:496) in /wp-includes/pluggable.php on line 1196
I read multiple posts in WP forum which have been closed. But it couldn't help me to fix this.
Anyone?
Thanks.