the client is not authorized to request an authorization

Hi Guys,

I have installed RHEV-M 4.1 successfully. but I got a problem when i am trying to login:
the client is not authorized to request an authorization
i have tried :

https://hostname/ovirt-engine

https://IP-add/ovirt-engine.

I have done the following solutions but it does not work.
add hostname in : nano /etc/sysconfig/network

add hostname in: Nano /etc/hosts

ip address hostname

hostnamectl set-hostname name

Please advise
Thanks in advance.