wordpress - WP_List_Table error in Gravity Forms -

after updating wordpress latest version error whenever try add new confirmation or notification: function wp_list_table::get_columns() must over-ridden in sub-class.

i can try add new ones they're not saved , when go notifications/confirmations pages see error there.

i tried editing notification.php recommended in post found, fixes problem notifications tab. still can't add new confirmations.

any help? in advance!

i found same issue , how resolve (answer sunwukong):

in notification.php, in class

gfnotificationtable extends wp_list_table { ...

add method:

function get_columns() {     $columns = array(             'name' => 'name',             'subject' => 'subject'             );     return $columns; }