Error in graphlab.SFrame('home_data.gl/')
<p>I am doing <strong>Machine Learning</strong> Course from Coursera <strong>by University of Washington</strong>. In which I am using iPython's graphlab. During practise when I execute below command:</p>

<pre><code>sales = graphlab.SFrame('home_data.gl/')
</code></pre>

<p>I am getting the error:</p>

<pre><code>InvalidProductKey                         Traceback (most recent call last)
&lt;ipython-input-3-c5971b60b216&gt; in &lt;module&gt;()
----&gt; 1 sales=graphlab.SFrame('home_data.gl/')

/opt/conda/lib/python2.7/site-packages/graphlab/data_structures/sframe.pyc in __init__(self, data, format, _proxy)
865             self.__proxy__ = _proxy
866         else:
--&gt; 867             self.__proxy__ = UnitySFrameProxy(glconnect.get_client())
868             _format = None
869             if (format == 'auto'):

/opt/conda/lib/python2.7/site-packages/graphlab/connect/main.pyc in get_client()
138     """
139     if not is_connected():
--&gt; 140         launch()
141     assert is_connected(), ENGINE_START_ERROR_MESSAGE
142     return __CLIENT__

/opt/conda/lib/python2.7/site-packages/graphlab/connect/main.pyc in launch(server_addr, server_bin, server_log, auth_token, server_public_key)
 90         if server:
 91             server.try_stop()
 ---&gt; 92         raise e
 93     server.set_log_progress(True)
 94     # start the client

 InvalidProductKey: Product key not found.
</code></pre>

<p>(Note the ipython notebook and home_data.gl are in same folder.)</p>