Vertica 8.1.0-2 MC issue Registering DB from Debian

Hi guys,
I have installed Vertica 8.1.0-2 installed on Debian working ok. I´ve also installed MC on this server and it seems to be working. When I try to register the DB inside MC Import Wizard, specifically when I put the API Key, in the new screen, appears Vertica hosts: 0. When I click on import button, nothing happens...
Tried to install MC on a MacBook but the same issue occurs there..
Any clues!?