'python3 train.py --type vocl' meet the error

[ResidualNS]

How to solve the following problem?
Traceback (most recent call last):
File "train.py", line 776, in
train(hyp)
File "train.py", line 249, in train
dataset = LoadImagesAndLabels(train_path, imgsz, batch_size,
File "/media/ubuntu/Data/comen/PycharmProjects/zyp_projects/mobile-yolov5-pruning-distillation/utils/datasets.py", line 277, in init
assert n > 0, 'No images found in %s. See %s' % (path, help_url)
AssertionError: No images found in dataset/voc/voc_train.txt. See https://github.com/ultralytics/yolov5/wiki/Train-Custom-Data