[PATCH] Deprecated use of add_options_page

In yd-wpmu-sitewide-options.php method yd_wpmuso_menu() you’re calling:

add_options_page(
	__('YD Network-wide Options',
		'yd-wpmuso'),
	__('YD Network-wide Options', 'yd-wpmuso'),
	8,
	__FILE__,
		'yd_wpmuso_options'
		);

When WP_DEBUG is on this results in the PHP warning:
Notice: has_cap was called with an argument that is deprecated since version 2.0! Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead. in /path/to/wp-includes/functions.php on line 2722

As per the documentation the third argument should be a capability – in your case probably manage_options?

Replace your above code with the following and you should be good to go:

function yd_wpmuso_menu() {
	add_options_page(
		__('YD Network-wide Options', 'yd-wpmuso'),
		__('YD Network-wide Options', 'yd-wpmuso'),
		'manage_options',
		__FILE__,
		'yd_wpmuso_options'
	);
}

https://www.ads-software.com/extend/plugins/yd-wpmu-sitewide-options/