ortools version causing error?

[markrickert]

I'm trying to get this all up and running and am having a problem running the solver. I've got my planets and sectors mapped but when i run the notebook, i get the following error:

TypeError                                 Traceback (most recent call last)
<ipython-input-5-178cad6ada88> in <module>
     39   return total_distance, best_ortools_path
     40 
---> 41 total_distance, best_ortools_path = solve_tsp_with_ortools(planet_pairwise_distances, 5000)
     42 
     43 print('Total distance: ' + str(total_distance))

<ipython-input-5-178cad6ada88> in solve_tsp_with_ortools(pairwise_distances, max_time)
     16 
     17   # create routing model
---> 18   routing = pywrapcp.RoutingModel(tsp_size, num_routes, depot)
     19   search_parameters = pywrapcp.RoutingModel.DefaultSearchParameters()
     20 

/usr/local/lib/python3.8/site-packages/ortools/constraint_solver/pywrapcp.py in __init__(self, *args)
   3603 
   3604     def __init__(self, *args):
-> 3605         _pywrapcp.RoutingModel_swiginit(self, _pywrapcp.new_RoutingModel(*args))
   3606     __swig_destroy__ = _pywrapcp.delete_RoutingModel
   3607 

TypeError: Wrong number or type of arguments for overloaded function 'new_RoutingModel'.
  Possible C/C++ prototypes are:
    operations_research::RoutingModel::RoutingModel(operations_research::RoutingIndexManager const &)
    operations_research::RoutingModel::RoutingModel(operations_research::RoutingIndexManager const &,operations_research::RoutingModelParameters const &)