This is error log from Chrome console when opening a page to edit:
yoast-components-1520.js:1 Uncaught TypeError: Cannot read property 'MessageBox' of undefined
at Object.<anonymous> (yoast-components-1520.js:1)
at n (yoast-components-1520.js:1)
at Object.<anonymous> (yoast-components-1520.js:1)
at n (yoast-components-1520.js:1)
at yoast-components-1520.js:1
at yoast-components-1520.js:1
(anonymous) @ yoast-components-1520.js:1
n @ yoast-components-1520.js:1
(anonymous) @ yoast-components-1520.js:1
n @ yoast-components-1520.js:1
(anonymous) @ yoast-components-1520.js:1
(anonymous) @ yoast-components-1520.js:1
post-edit-1520.js:1 Uncaught TypeError: Cannot read property 'analysis' of undefined
at Object.<anonymous> (post-edit-1520.js:1)
at f (commons-1520.js:1)
at Object.<anonymous> (post-edit-1520.js:1)
at f (commons-1520.js:1)
at Object.<anonymous> (post-edit-1520.js:1)
at f (commons-1520.js:1)
at t (commons-1520.js:1)
at Array.r [as push] (commons-1520.js:1)
at post-edit-1520.js:1
(anonymous) @ post-edit-1520.js:1
f @ commons-1520.js:1
(anonymous) @ post-edit-1520.js:1
f @ commons-1520.js:1
(anonymous) @ post-edit-1520.js:1
f @ commons-1520.js:1
t @ commons-1520.js:1
r @ commons-1520.js:1
P.S.
As a separate note – Configuration Wizard is not working on any of dozens website we manage, no matter the hosting environment or website configuration (themes or plugins used), with error like this:
post.php?post=36&action=edit:303 GET https://www.mywebsite.com/wp-content/plugins/wordpress-seo/js/dist/yoast/configuration-wizard-1520.js net::ERR_ABORTED 404 (Not Found)