1 test scripts failed to run,

 Starting smartctl-validate (id: 189, script_version_id: 1)
May 17 01:09:30 aware-magpie cloud-init[1673]: 1 test scripts failed to run
May 17 01:09:30 aware-magpie cloud-init[1673]: Exception in thread smartctl-validate (id: 189, script_version_id: 1):
May 17 01:09:30 aware-magpie cloud-init[1673]: Traceback (most recent call last):
May 17 01:09:30 aware-magpie cloud-init[1673]: File "/usr/lib/python3.6/threading.py", line 916, in _bootstrap_inner
May 17 01:09:30 aware-magpie cloud-init[1673]: self.run()
May 17 01:09:30 aware-magpie cloud-init[1673]: File "/usr/lib/python3.6/threading.py", line 864, in run
May 17 01:09:30 aware-magpie cloud-init[1673]: self._target(*self._args, **self._kwargs)
May 17 01:09:30 aware-magpie cloud-init[1673]: File "/tmp/user_data.sh.Uc7Y2J/bin/maas-run-remote-scripts", line 340, in run_script
May 17 01:09:30 aware-magpie cloud-init[1673]: script_arguments = parse_parameters(script, scripts_dir)
May 17 01:09:30 aware-magpie cloud-init[1673]: File "/tmp/user_data.sh.Uc7Y2J/bin/maas-run-remote-scripts", line 288, in parse_parameters
May 17 01:09:30 aware-magpie cloud-init[1673]: model = value.get('model')
May 17 01:09:30 aware-magpie cloud-init[1673]: AttributeError: 'str' object has no attribute 'get'
May 17 01:09:30 aware-magpie ec2:

maas 2.4.0~beta2