When deploying openstack-base from Charmhub using Juju 3.x, the deployment fails immediately with:
ERROR cannot deploy bundle: invalid charm URL "cs:ntp-47": schema "cs" not valid
Root cause: revision 79 of openstack-base on Charmhub still references cs:ntp-47 (old Charm Store), which Juju 3.x rejects at parse time before deploying anything.
The fix is already in master with commit ec4897f (Jan 2023, “NTP charm from charmhub”), but the fixed version hasn’t been republished to Charmhub.
Workaround: pull the bundle directly from GitHub master instead of Charmhub.
Filed LP bug: https://bugs.launchpad.net/openstack-bundles/+bug/2143611