Despite this Quick cache is still working, but I'm no more able to reach the admin section!
I tryed to reach QC setting page from a cached page - where the icon was still visible - and the answer is "You do not have permission to access this page"

I think the error it's from some wrong role permission... but I'm not such a good coder!
This is not the first time it happens to me after upgrading from 2.2.7 (last stable version for me).
Can somebody help?