sunbeam cluster bootstrap error code 100

I follow the Install OpenStack and launch your first instance | Ubuntu

to deploy but failed at execute “sunbeam cluster bootstrap --accept-defaults” or “sunbeam cluster bootstrap”, the logs show:

ubuntu@node1:~$ sunbeam cluster bootstrap --accept-defaults
Error: ERROR provisioning failed, removing machine 1: subprocess encountered error code 100 ERROR error cleaning up machine: ERROR subprocess encountered error code 100

ubuntu@node1:~$

How can I fix it to proceed?