No styles nor TinyMCE on 9.0

[juanjointera5]

First of all, thank you for this great module!

I've just installed 9.0 on a fresh PS 8.2.6 installation, and the UI show weird, some styles are missing and no TinyMCE, even with "Extends TinyMCE on blocks management ? " is enabled.

Some examples:

Is that how it should look, or am I missing something?

I tried clearing all caches.

Thanks!