Cannot make this work at all

Please help !!!
I tried posting this earlier, but it may not have been clear.
I really would like to make this work, but I’m missing something here.
The goal is to add a menu option if the user is a “Sponsor” as defined by another plugin.
Here’s the code. Why does it give me the following 2 errors ????

Undefined index: user-is-sponsor in wp-content/plugins/if-menu/if-menu.php on line 105
Warning: call_user_func() expects parameter 1 to be a valid callback, no array or string given in wp-content/plugins/if-menu/if-menu.php on line 105

// add "affiliate-area" menu item for affiliates
add_filter( 'if_menu_conditions', 'conditional_affiliate_menu' );
function conditional_affiliate_menu( $conditions ) {
	$conditions[] = array(
		'id'      =>  'user-is-sponsor',
		'name'    =>  'User is Sponsor',
		'condition' =>  'this_user_is_affiliate' }
	);
	return $conditions;
}
function this_user_is_affiliate ($item=array()) {
	$userID = get_current_user_id();
	if (!$userID) return 0;
	return affwp_is_affiliate($userID);  // function in other plugin
}