E2EE enabled but not encrypted

On the server and client I enabled E2EE.

I’m reading Using end-to-end encryption — Nextcloud latest User Manual latest documentation

I created a new folder and moved the NC marketing material to this folder. Nothning gets encrypted, on the server username/files is in clear text.

How do I encrypt ?

Oh I understand that only empty folders can be encrypted and that Documents is not empty.

I removed the content and see:

With E2EE you have to explicitly encrypt a folder. Did you do that too?

yes i ev entually did in the nc client and now I got the error