I will file a bug. Here is what I am seeing.
http://www.smallworldadventures.com/
Fatal error: Cannot access private property GFP_Stripe::$version in /home/guyerb/smallworldadventures.com/wp-content/plugins/gravityforms-stripe-more/more-stripe.php on line 316
I can also confirm that disabling the Comprehensive Google Map Plugin restores Yoast SEO functionality in WP 4.0.
I can also confirm that after upgrading to Worpress 4.0 my SEO options were gone. Deactivating the Comprehensive Google Map plugin cleared up the problem for SEO.