These errors started appearing both in admin and on the front end after I made a bunches of changes using WP Helpers:

Notice: Undefined variable: priority in /Users/donna/Sites/lcso/wp-content/plugins/wp-helpers/wp-helpers.php on line 488

Notice: Undefined variable: priority in /Users/donna/Sites/lcso/wp-content/plugins/wp-helpers/wp-helpers.php on line 488

Notice: Undefined index: in /Users/donna/Sites/lcso/wp-content/plugins/wp-helpers/wp-helpers.php on line 488

Notice: Undefined variable: priority in /Users/donna/Sites/lcso/wp-content/plugins/wp-helpers/wp-helpers.php on line 488

Notice: Undefined variable: priority in /Users/donna/Sites/lcso/wp-content/plugins/wp-helpers/wp-helpers.php on line 488

Notice: Undefined index: in /Users/donna/Sites/lcso/wp-content/plugins/wp-helpers/wp-helpers.php on line 488

I was able to clear it up by adding "&& isset($priority)" as shown:

if(!empty($filter) && isset($priority) ) {
   remove_action($filter, $tag, $priority, $wp_filter[$filter][$priority][$tag]['accepted_args']);
}