I've an error on my wordpress site : I just modify little thing I use Buddyboss and learndash 3.0 and this have appeared since I've modify something but I don't know what is this error Notice: Undefined index: id_base in /www/zenmondrops_878/public/wp-content/plugins/widget-options/includes/widgets/display.php on line 414 Thanks in advance
Modifying a plugin is generally not a great idea. Whenever the plugin us updated, your changes are going to be removed.
From what it looks like, on line 414 in display.php you are referencing an array index that does not exist. If you want to resolve this, simply check that the array index exists before trying to access it. You can find a more detailed answer on how to do that here: "Notice: Undefined variable", "Notice: Undefined index", and "Notice: Undefined offset" using PHP