Create vCenter host. Stuck in INIT state.

Hi folks,
I have a vCenter 6.7.3 and a fresh deployment of vOneCloud-
I want to start managing my vCenter in OpenNebula, so I add a Host of type “VMWare vCenter” under Infrastructure / Hosts.

Host is added but stuck in “ERROR” state.

I can see this message repeating every few seconds in /var/log/one/oned.log: result FAILURE [] User couldn't be authenticated, abor
ting call.

I tried importing host in SunStone and CLI, also tried changing password of this user, but same error arises.

User in vCenter belongs to “Administrators” group.

Can anyone help? Thanks!