Cannot start new servers at digital ocean

[PhilETaylor]

I'm connected and can list my current servers (droplets) but I cannot start new ones.

~/Sites/bfnetwork on master $ nubo start --privkey ~/.ssh/id_rsa --name test 10274087
Traceback (most recent call last):
  File "/usr/local/bin/nubo", line 4, in <module>
    __import__('pkg_resources').run_script('nubo==0.7', 'nubo')
  File "build/bdist.macosx-10.10-x86_64/egg/pkg_resources/__init__.py", line 652, in run_script
  File "build/bdist.macosx-10.10-x86_64/egg/pkg_resources/__init__.py", line 1580, in run_script
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nubo-0.7-py2.7.egg/EGG-INFO/scripts/nubo", line 201, in <module>

  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nubo-0.7-py2.7.egg/EGG-INFO/scripts/nubo", line 198, in main

  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nubo-0.7-py2.7.egg/EGG-INFO/scripts/nubo", line 125, in start

  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nubo-0.7-py2.7.egg/nubo/clouds/digitalocean.py", line 41, in deploy
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/apache_libcloud-0.17.0-py2.7.egg/libcloud/compute/drivers/digitalocean.py", line 167, in ex_create_ssh_key
    assert 'ssh_key' in data
AssertionError