Hello,
So i’m working again on it, and tried some things. First I printed the list of capabilities of an editor. I could see the customize cap. Sadly it was not enough to get it working. So I finally added the edit_theme_options cap to the editor instead of the customize cap. Now they can access the customizer among other options.
So I have something working, but I don’t understand the utility of the customize cap if I don’t have access to the customizer…
Anyway thank you for the support !
Hello,
thanks for your reply.
I tried your piece of code. The customize top menu item now appears. That’s great. Sadly, clicking on this new entry gives me this :

I had already tried before to hit the customize URI before, and it had given me the same message.
I also tried with all plugins deactivated, no changes.