The first place everyone is going to click is
Welcome to Cockpit application. Browse the manual here.
which points to nowhere as in attached screenshot.
Hi Uwe,
it looks like the link is pointing to an old location of the manuals. I will address this to our R&D team and I pretty confident, that the link will be fixed in an upcoming version. Until then you can find the documentation at https://cumulocity.com/guides/about-doc/overview/.
best regards
Michael