` Traceback (most recent call last):
 
 "/home/ubuntu/.local/bin/mlflow", line 11, in <module>

sys.exit(cli())


 "/home/ubuntu/.local/lib/python2.7/site-packages/click/core.py", line 764, in __call__

return self.main(*args, **kwargs)


 "/home/ubuntu/.local/lib/python2.7/site-packages/click/core.py", line 717, in main

rv = self.invoke(ctx)


 "/home/ubuntu/.local/lib/python2.7/site-packages/click/core.py", line 1137, in invoke

return _process_result(sub_ctx.command.invoke(sub_ctx))


 "/home/ubuntu/.local/lib/python2.7/site-packages/click/core.py", line 956, in invoke

return ctx.invoke(self.callback, **ctx.params)


 "/home/ubuntu/.local/lib/python2.7/site-packages/click/core.py", line 555, in invoke

return callback(*args, **kwargs)


 "/home/ubuntu/.local/lib/python2.7/site-packages/mlflow/cli.py", line 137, in run

run_id=run_id,


 "/home/ubuntu/.local/lib/python2.7/site-packages/mlflow/projects/__init__.py", line 230, in run

use_conda=use_conda, storage_dir=storage_dir, synchronous=synchronous, run_id=run_id)


 "/home/ubuntu/.local/lib/python2.7/site-packages/mlflow/projects/__init__.py", line 85, in _run

project = _project_spec.load_project(work_dir)


 "/home/ubuntu/.local/lib/python2.7/site-packages/mlflow/projects/_project_spec.py", line 40, in load_project

entry_points[name] = EntryPoint(name, parameters, command)


 "/home/ubuntu/.local/lib/python2.7/site-packages/mlflow/projects/_project_spec.py", line 87, in __init__

self.parameters = {k: Parameter(k, v) for (k, v) in parameters.items()}
AttributeError: 'NoneType' object has no attribute 'items'

Traceback (most recent call last):


 "/usr/bin/azure-cli/lib/python3.6/site-packages/azure/cli/main.py", line 36, in main

cmd_result = APPLICATION.execute(args)


 "/usr/bin/azure-cli/lib/python3.6/site-packages/azure/cli/core/application.py", line 212, in execute

result = expanded_arg.func(params)


 "/usr/bin/azure-cli/lib/python3.6/site-packages/azure/cli/core/commands/__init__.py", line 377, in __call__

return self.handler(*args, **kwargs)


 "/usr/bin/azure-cli/lib/python3.6/site-packages/azure/cli/core/commands/arm.py", line 450, in handler

raise ex


 "/usr/bin/azure-cli/lib/python3.6/site-packages/azure/cli/core/commands/arm.py", line 405, in handler

instance = custom_function(instance, **custom_func_args)


 "/usr/bin/azure-cli/lib/python3.6/site-packages/azure/cli/command_modules/network/custom.py", line 1672, in update_vnet

instance.dhcp_options.dns_servers = dns_servers
AttributeError: 'NoneType' object has no attribute 'dns_servers'
