Jottacloud Error 401 (Unauthorized)

I tried to get the machine up, but with VirtualBox on my Win10 Home (so no Hyper-V) machine, even after disabling the Hypervirtualization in windows features, I cannot get it running :\

It ends with a black window with gray dots of the windows logo several times on the screen, consuming the CPU but not reacting to anything. Dunno where to report it, as there’s its OT…