I've just updated to 2.3.3, and the manager's tree is fine, but the manager backend has no top menu.
There's no way to navigate. I checked in Developer Tools, and all files/css is loading and no JS errors. Anyone have any idea what to check?
Try this:
In the database, turn off the compress_js and compress_css System Settings in the modx_system_settings table. Then clear your browser cache and cookies and delete all files in the core/cache directory before logging back in.