Traceback (most recent call last):


 "C:\Users\adnan\AppData\Local\Programs\Python\Python38-32\lib\site-packages\tornado\ioloop.py", line 907, in _run

return self.callback()


 "C:\Users\adnan\AppData\Local\Programs\Python\Python38-32\lib\site-packages\distributed\nanny.py", line 414, in memory_monitor

process = self.process.process
AttributeError: 'NoneType' object has no attribute 'process'

Traceback (most recent call last):


 "/content/CenterNet-master/train.py", line 43, in prefetch_data

data, ind = sample_data(db, ind, data_aug=data_aug)


 "/content/CenterNet-master/sample/coco.py", line 199, in sample_data

return globals()[system_configs.sampling_function](db, k_ind, data_aug, debug)


 "/content/CenterNet-master/sample/coco.py", line 99, in kp_detection

image, detections = random_crop(image, detections, rand_scales, input_size, border=border)


 "/content/CenterNet-master/sample/utils.py", line 57, in random_crop

image_height, image_width = image.shape[0:2]
AttributeError: 'NoneType' object has no attribute 'shape'
