I know a lot of people are reporting problems with the TinyMCE missing or the content area being white but actually displaying code along with the content (in white).
I noticed something that I haven't seen reported before. There seems to be a connection with user level. If I log in as admin i see everything as expected and all works fine. If I log in as editor or below the problems arise.
So I upgraded to the latest version and thought the problem was solved at all user levels. Except it isn't. Post editing is absolutely fine but page editing still shows the problems mentioned above.
For now I have deactivated Yoast SEO so that my client can use their site again but its less than ideal as your plugin is essential (and very good).