I have installed Spreadsheets module on a server (google cloud hosting). I have filled in the authentication code from Google Apps but when I add a list to google spreadsheet, it gives :

 File "/home/odoo/odoo-prj/odoo_src/addons/web/controllers/main.py", line 936, in _call_kw
 return getattr(request.registry.get(model), method)(request.cr, request.uid, *args, **kwargs)
 File "/home/odoo/odoo-prj/odoo_src/openerp/api.py", line 241, in wrapper
 return old_api(self, *args, **kwargs)
 File "/home/odoo/odoo-prj/odoo_src/addons/google_spreadsheet/google_spreadsheet.py", line 113, in set_spreadsheet
 res = self.copy_doc(cr, uid, False, config.google_drive_resource_id, title, model, context=context) 
 File "/home/odoo/odoo-prj/odoo_src/openerp/api.py", line 241, in wrapper
 return old_api(self, *args, **kwargs)
 File "/home/odoo/odoo-prj/odoo_src/addons/google_drive/google_drive.py", line 118, in copy_doc 
 content = urllib2.urlopen(req, timeout=TIMEOUT).read()
 File "/usr/lib/python2.7/urllib2.py", line 127, in urlopen
 return _opener.open(url, data, timeout)
 File "/usr/lib/python2.7/urllib2.py", line 407, in open
 response = meth(req, response)
 File "/usr/lib/python2.7/urllib2.py", line 520, in http_response
 'http', request, response, code, msg, hdrs)
 File "/usr/lib/python2.7/urllib2.py", line 445, in error
 return self._call_chain(*args)
 File "/usr/lib/python2.7/urllib2.py", line 379, in _call_chain
 result = func(*args)
 File "/usr/lib/python2.7/urllib2.py", line 528, in http_error_default
 raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
HTTPError: HTTP Error 500: Internal Server Error

What is the issue here ? Thank you.