I get this error when I install the plugin, even if it's not activated, because the
Site Wide Only: true header is deprecated.
( ! ) Notice: get_plugin_data was called with an argument that is <strong>deprecated</strong> since version 3.0! The <code>Site Wide Only: true</code> plugin header is deprecated. Use <code>Network: true</code> instead. in /var/www/vhosts/example.com/httpdocs/wp/wordpress/wp-includes/functions.php on line 2722