Please give us a description of what happened.

Editor goes blank.

Please describe what you expected to happen and why.

Editor isn't blank.

How can we reproduce this behavior?

1. Have a SEO optimized website.
2. Learn about pagespeed and lighthouse, after which you install something that does deferred loading of javascript.
3. Cry over Yoast 8.0 which has hardcoded inline javascript with dependencies, and thus crashes the editor.

FIX

The fix is that yoast should replace the offending line 221 in admin/class-admin-asset-manager.php and write a version which honors dependencies and the loading order (i.e put this in a javascript file marked with lodash as a dependency). I mean come on, Inline javascript like that is so 1995.