runtime error

Traceback (most recent call last): File "/home/user/app/app.py", line 10, in <module> myHumanGen = HumanGenService() File "/home/user/app/gen_client.py", line 284, in __init__ self.oss_service = ossService() File "/home/user/app/oss_utils.py", line 39, in __init__ self.Prefix = "oss://" + self.BucketName TypeError: can only concatenate str (not "NoneType") to str

Container logs: