a bytes-like object is required, not 'str'

[tiantian-bot]

Traceback (most recent call last):
File "E:/pyrl-master/test.py", line 35, in
env = SUMO('nets/OW/OW-traci.sumocfg', 8813, False)
File "E:\pyrl-master\environment\sumo.py", line 23, in init
self.__create_env(cfg_file, port, use_gui)
File "E:\pyrl-master\environment\sumo.py", line 89, in __create_env
self.__create_vehicles()
File "E:\pyrl-master\environment\sumo.py", line 123, in __create_vehicles
print(type(route.split(' ')[0]))
TypeError: a bytes-like object is required, not 'str'

Can you tell me where is wrong,Thank you