Preparing to unpack .../00-maas-dns_2.1.3+bzr5573-0ubuntu1_all.deb ... Unpacking maas-dns (2.1.3+bzr5573-0ubuntu1) over (2.1.0+bzr5480-0ubuntu1) ... Preparing to unpack .../01-maas-region-api_2.1.3+bzr5573-0ubuntu1_all.deb ... Unpacking maas-region-api (2.1.3+bzr5573-0ubuntu1) over (2.1.0+bzr5480-0ubuntu1) ... Preparing to unpack .../02-maas-rack-controller_2.1.3+bzr5573-0ubuntu1_all.deb ... Unpacking maas-rack-controller (2.1.3+bzr5573-0ubuntu1) over (2.1.0+bzr5480-0ubuntu1) ... Preparing to unpack .../03-maas-common_2.1.3+bzr5573-0ubuntu1_all.deb ... Unpacking maas-common (2.1.3+bzr5573-0ubuntu1) over (2.1.0+bzr5480-0ubuntu1) ... Preparing to unpack .../04-maas_2.1.3+bzr5573-0ubuntu1_all.deb ... Unpacking maas (2.1.3+bzr5573-0ubuntu1) over (2.1.0+bzr5480-0ubuntu1) ... Preparing to unpack .../05-maas-region-controller_2.1.3+bzr5573-0ubuntu1_all.deb ... Unpacking maas-region-controller (2.1.3+bzr5573-0ubuntu1) over (2.1.0+bzr5480-0ubuntu1) ... Preparing to unpack .../06-maas-dhcp_2.1.3+bzr5573-0ubuntu1_all.deb ... Unpacking maas-dhcp (2.1.3+bzr5573-0ubuntu1) over (2.1.0+bzr5480-0ubuntu1) ... Preparing to unpack .../07-python3-django-maas_2.1.3+bzr5573-0ubuntu1_all.deb ... Unpacking python3-django-maas (2.1.3+bzr5573-0ubuntu1) over (2.1.0+bzr5480-0ubuntu1) ... Preparing to unpack .../08-maas-cli_2.1.3+bzr5573-0ubuntu1_all.deb ... Unpacking maas-cli (2.1.3+bzr5573-0ubuntu1) over (2.1.0+bzr5480-0ubuntu1) ... Preparing to unpack .../09-python3-maas-provisioningserver_2.1.3+bzr5573-0ubuntu1_all.deb ... Unpacking python3-maas-provisioningserver (2.1.3+bzr5573-0ubuntu1) over (2.1.0+bzr5480-0ubuntu1) ... Preparing to unpack .../10-python3-maas-client_2.1.3+bzr5573-0ubuntu1_all.deb ... Unpacking python3-maas-client (2.1.3+bzr5573-0ubuntu1) over (2.1.0+bzr5480-0ubuntu1) ... Preparing to unpack .../11-maas-proxy_2.1.3+bzr5573-0ubuntu1_all.deb ... Unpacking maas-proxy (2.1.3+bzr5573-0ubuntu1) over (2.1.0+bzr5480-0ubuntu1) ... Setting up maas-proxy (2.1.3+bzr5573-0ubuntu1) ... Setting up python3-maas-client (2.1.3+bzr5573-0ubuntu1) ... Setting up maas-dhcp (2.1.3+bzr5573-0ubuntu1) ... Setting up python3-django-maas (2.1.3+bzr5573-0ubuntu1) ... Setting up python3-maas-provisioningserver (2.1.3+bzr5573-0ubuntu1) ... Setting up maas-cli (2.1.3+bzr5573-0ubuntu1) ... Setting up maas-common (2.1.3+bzr5573-0ubuntu1) ... Setting up maas-region-api (2.1.3+bzr5573-0ubuntu1) ... Installing new version of config file /etc/maas/preseeds/curtin_userdata ... Installing new version of config file /etc/maas/preseeds/curtin_userdata_centos ... Installing new version of config file /etc/maas/preseeds/curtin_userdata_custom ... Installing new version of config file /etc/maas/preseeds/curtin_userdata_suse ... Installing new version of config file /etc/maas/preseeds/curtin_userdata_windows ... Considering dependency proxy for proxy_http: Module proxy already enabled Module proxy_http already enabled Considering dependency proxy for proxy_wstunnel: Module proxy already enabled Module proxy_wstunnel already enabled Module expires already enabled Module rewrite already enabled Setting up maas-dns (2.1.3+bzr5573-0ubuntu1) ... Setting up maas-region-controller (2.1.3+bzr5573-0ubuntu1) ... Operations to perform:  Synchronize unmigrated apps: messages, staticfiles  Apply all migrations: sites, piston3, metadataserver, maasserver, contenttypes, sessions, auth Synchronizing apps without migrations: Creating tables... Running deferred SQL... Installing custom SQL... Running migrations: Rendering model states... DONE Applying maasserver.0093_add_rdns_model... OK Setting up maas-rack-controller (2.1.3+bzr5573-0ubuntu1) ... Traceback (most recent call last): File "/usr/sbin/maas-rack", line 85, in main() File "/usr/sbin/maas-rack", line 81, in main run() File "/usr/sbin/maas-rack", line 52, in run from provisioningserver.__main__ import main File "/usr/lib/python3/dist-packages/provisioningserver/__main__.py", line 8, in import provisioningserver.boot.install_grub File "/usr/lib/python3/dist-packages/provisioningserver/boot/__init__.py", line 387, in PXEBootMethod(), File "/usr/lib/python3/dist-packages/provisioningserver/boot/__init__.py", line 275, in __init__ assert issubclass(type(self.template_subdir), Optional[str]) File "/usr/lib/python3.5/typing.py", line 770, in __subclasscheck__ raise TypeError("Unions cannot be used with issubclass().") TypeError: Unions cannot be used with issubclass(). dpkg: error processing package maas-rack-controller (--configure): subprocess installed post-installation script returned error exit status 1