Odoo Date_Range module Error

Error on install attempt: Traceback (most recent call last): File “/usr/lib/python2.7/dist-packages/odoo/http.py”, line 641, in _handle_exception return super(JsonRequest, self)._handle_exception(exception) File “/usr/lib/python2.7/dist-packages/odoo/http.py”, line 683, in dispatch result = self._call_function(**self.params) File “/usr/lib/python2.7/dist-packages/odoo/http.py”, line 333, in _call_function return checked_call(self.db, *args, **kwargs) File “/usr/lib/python2.7/dist-packages/odoo/service/model.py”, line 101, in wrapper return f(dbname, *args, **kwargs) File “/usr/lib/python2.7/dist-packages/odoo/http.py”, line…

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