Get usergroups of current user

To hide the Forum from my Menu if the logged in user is not part of any usergroup, I used the following code:

add_action( 'wp_head', function () { 
	$current_user_id = get_current_user_id();
	// Get usergroups of current users 
	$usergroups = AsgarosForumUserGroups::getUserGroupsOfUser($current_user_id, 'all', true);
	
	if (
		!$current_user_id || !$usergroups
	) {
		?><style>.forum-item{display:none!important;}</style><?php	
	}
});

See for this code: https://www.ads-software.com/support/topic/is-there-a-function-to-check-if-logged-in-user-belongs-to-a-usergroup/

This used to work. However, I suddenly discovered it no longer displays the menu item. If I remove || !$usergroups from the code it does display the menu item. Apparently, it thinks I’m not a user who is part of a usergroup (which I am).

Has something change in the plugin code? Any suggestions how I should change the code snippet?