Al ejecutar el wizard de asignacion de certificado de la AFIP tira error

[csrocha]

Traceback (most recent call last):
File "/opt/odoo/prod/local/lib/python2.7/site-packages/odoo-8.0-py2.7.egg/openerp/http.py", line 537, in _handle_exception
return super(JsonRequest, self)._handle_exception(exception)
File "/opt/odoo/prod/local/lib/python2.7/site-packages/odoo-8.0-py2.7.egg/openerp/http.py", line 574, in dispatch
result = self._call_function(*_self.params)
File "/opt/odoo/prod/local/lib/python2.7/site-packages/odoo-8.0-py2.7.egg/openerp/http.py", line 310, in _call_function
return checked_call(self.db, *args, *_kwargs)
File "/opt/odoo/prod/local/lib/python2.7/site-packages/odoo-8.0-py2.7.egg/openerp/service/model.py", line 113, in wrapper
return f(dbname, _args, *_kwargs)
File "/opt/odoo/prod/local/lib/python2.7/site-packages/odoo-8.0-py2.7.egg/openerp/http.py", line 307, in checked_call
return self.endpoint(_a, *_kw)
File "/opt/odoo/prod/local/lib/python2.7/site-packages/odoo-8.0-py2.7.egg/openerp/http.py", line 803, in call
return self.method(_args, *_kw)
File "/opt/odoo/prod/local/lib/python2.7/site-packages/odoo-8.0-py2.7.egg/openerp/http.py", line 403, in response_wrap
response = f(_args, *_kw)
File "/opt/odoo/prod/local/lib/python2.7/site-packages/odoo-8.0-py2.7.egg/openerp/addons/web/controllers/main.py", line 948, in call_button
action = self._call_kw(model, method, args, {})
File "/opt/odoo/prod/local/lib/python2.7/site-packages/odoo-8.0-py2.7.egg/openerp/addons/web/controllers/main.py", line 936, in _call_kw
return getattr(request.registry.get(model), method)(request.cr, request.uid, _args, *_kwargs)
File "/opt/odoo/prod/local/lib/python2.7/site-packages/odoo-8.0-py2.7.egg/openerp/api.py", line 241, in wrapper
return old_api(self, _args, *_kwargs)
File "/opt/odoo/prod/local/lib/python2.7/site-packages/odoo-8.0-py2.7.egg/openerp/addons/base/res/res_config.py", line 155, in action_next
next = self.execute(cr, uid, ids, context=context)
File "/opt/odoo/prod/local/lib/python2.7/site-packages/odoo-8.0-py2.7.egg/openerp/api.py", line 241, in wrapper
return old_api(self, _args, *_kwargs)
File "/opt/odoo/prod/local/lib/python2.7/site-packages/odoo-8.0-py2.7.egg/openerp/addons/l10n_ar_wsafip/config.py", line 94, in execute
wz.wsafip_request_id.have_crt(can_raise=True)
AttributeError: 'crypto.certificate' object has no attribute 'have_crt'