Unable to save articles in front end

When trying to save an article edited with Pagebuilder I get a 403 error.
Page Builder CK Version 2.7.0 LIGHT
Template Creator CK Version 4.0.25
According to the documentation there should be a button to switch to Pagebuilder when logged in to the front end but this does not seem to be the case. Is this not available in the LITE version?

Hi
the frontend edition is also available in the Light version, everything shall be working
I will check by my side again
CEd

just tested on a fresh install, created an article, everything works
I got the button, and I can save the article

are you doing that with a Super User ? are you sure that your user has the rights ?

Yes, I'm logging in as superuser. Where should the button be?

just above the article editor ...
do you see the button in the admin ? if yes, it shall be in the same place

This is what I see