Control Panel permission errors on load

Since you added the new security question, I have been unable to get a graphical control panel to load (not my site, just your control panel). It's all plain HTML. Error messages are:

Failed to load resource: the server responded with a status of 403 (Forbidden) on such files as: https://im.altervista.org/cp3/banzai-logo.png https://im.altervista.org/cp3/app/fm-small.png https://it.altervista.org/js/easing.js https://it.altervista.org/css/cp3/font-awesome.min.css https://it.altervista.org/css/cp3/cp.css?ver=1.2.0 https://it.altervista.org/js/av_help_popover.js

[karl94]

Could you please post a screenshot of the security question and the error messages?