Also, I can't destroy the environment after this happens:
jenkins@juju-oil-machine-15:~$ juju destroy-environment --force maas
WARNING! this command will destroy the "maas" environment (type: maas)
This includes all machines, services, data and other resources.
Continue [y/N]? y
ERROR cannot release nodes: gomaasapi: got error back from server: 500 INTERNAL SERVER ERROR ('NoneType' object has no attribute 'has_perm')
Also, I can't destroy the environment after this happens:
jenkins@ juju-oil- machine- 15:~$ juju destroy-environment --force maas
WARNING! this command will destroy the "maas" environment (type: maas)
This includes all machines, services, data and other resources.
Continue [y/N]? y
ERROR cannot release nodes: gomaasapi: got error back from server: 500 INTERNAL SERVER ERROR ('NoneType' object has no attribute 'has_perm')