Exception while running Jupyter notebook

Hi,

I am having following exception while running Jupyter notebook.

/opt/dataiku-dss-7.0.2/python/dataiku/core/plugin.py in import_from_plugin(plugin_id, package_name)
     18     """Import a package from the lib/ folder of the plugin and returns the module"""
     19     folders = intercom.jek_or_backend_json_call("plugins/get-lib-folders", data={
---> 20         "pluginId" : plugin_id
     21     })
     22 

/opt/dataiku-dss-7.0.2/python/dataiku/core/intercom.py in jek_or_backend_json_call(path, data, err_msg, **kwargs)
    176         return jek_json_call(path, data, err_msg, **kwargs)
    177     else:
--> 178         return backend_json_call(path, data, err_msg, **kwargs)
    179 
    180 def backend_get_call(path, data=None, err_msg=None, **kwargs):

/opt/dataiku-dss-7.0.2/python/dataiku/core/intercom.py in backend_json_call(path, data, err_msg, **kwargs)
    167 
    168 def backend_json_call(path, data=None, err_msg=None, **kwargs):
--> 169     return _handle_json_resp(backend_api_post_call(path, data, **kwargs), err_msg = err_msg)
    170 
    171 def jek_json_call(path, data=None, err_msg=None, **kwargs):

/opt/dataiku-dss-7.0.2/python/dataiku/core/intercom.py in _handle_json_resp(resp, err_msg)
    233         err_data = resp.text
    234         if err_data:
--> 235             raise Exception("%s: %s" % (err_msg, _get_error_message(err_data).encode("utf8")))
    236         else:
    237             raise Exception("%s: %s" % (err_msg, "No details"))

Exception: None: b'Ticket not given or unrecognized. Force reload the notebook.'

It goes away if you reload the notebook or quit it and reopen, but since this problem arises occasionally it would be good to have definite solution.