Error using one* commands

Hello everyone!
i’m new to opennebula and i’m trying to setup a demo lab using ubuntu server 16.04.5 and opennebula.
I’ve installed sunstone and host on the same machine but i see that i can’t execute any command like onevm list, oneuser etc… the error message that i see is:
[one.vmpool.info] User couldn’t be authenticated, aborting call.

i had a problem in the first place with oneadmin login in the frontend so i’ve followed this procedure to regain access to frontend page:
https://tweenpath.net/reset-oneadmin-password/

i’ve used the part talking of the database because as i said before i can’t execute any command one* like.

i’ve also checked oned.logs and i see this error:
**Sun Oct 7 09:35:29 2018 [Z0][ReM][D]: Req:8112 UID:-1 one.zone.raftstatus invoked **
Sun Oct 7 09:35:29 2018 [Z0][ReM][E]: Req:8112 UID:- one.zone.raftstatus result FAILURE [one.zone.raftstatus] User couldn’t be authenticated, aborting call.

because this error is presented periodically i think that should be some scheduler issue but i don’t know where to check and how to solve this.

Could you please help me?

Thanks!

Ps. this is my first post here so greetings to everyone of OpenNebula Forum!