In the past days, some WordPress websites generate huge error_log in public_html! all websites have cPanel. in all websites that have this problem, those error logs are the same content.

 PHP Warning:  next() expects parameter 1 to be array, null given in /home/username/public_html/wp-includes/class-wp-hook.php on line 291
 PHP Warning:  current() expects parameter 1 to be array, null given in /home/username/public_html/wp-includes/class-wp-hook.php on line 275
 PHP Warning:  Invalid argument supplied for foreach() in /home/username/public_html/wp-includes/class-wp-hook.php on line 277

I really do not know what that is and Why this has a sudden problem??

In the past days, some WordPress websites generate huge error_log in public_html! all websites have cPanel. in all websites that have this problem, those error logs are the same content.

 PHP Warning:  next() expects parameter 1 to be array, null given in /home/username/public_html/wp-includes/class-wp-hook.php on line 291
 PHP Warning:  current() expects parameter 1 to be array, null given in /home/username/public_html/wp-includes/class-wp-hook.php on line 275
 PHP Warning:  Invalid argument supplied for foreach() in /home/username/public_html/wp-includes/class-wp-hook.php on line 277

I really do not know why this problem? Why suddenly the logs are bulky?