TypeError: argument of type 'NoneType' is not iterable

[rfx123]

Hello Shmuma, any idea how i can resolve this error :

Traceback (most recent call last):
File "./python", line 37, in
proc_tracker.check(gpus, processes, active_users)
File "/home/mysystem/.config/python/gpu_mon/proc.py", line 128, in check
proc_conf = self.conf.process_config(gpu_id)
File "/home/mysystem/.config/python/gpu_mon/config.py", line 124, in process_config
if gpu_id in c.gpu_indices:
TypeError: argument of type 'NoneType' is not iterable

? Thank you