so i followed this documentation :
https://www.server-world.info/en/note?os=Ubuntu_20.04&p=openstack_victoria3&f=6
https://www.server-world.info/en/note?os=Ubuntu_20.04&p=openstack_victoria3&f=7
https://www.server-world.info/en/note?os=Ubuntu_20.04&p=openstack_victoria3&f=8
when i type this command as root :
openstack orchestration service list
the output is :
ERROR: None