assert nf > 0 or not augment, f'{prefix}No labels found in {cache_path}, can not start training. {HELP_URL}'
AssertionError: train: No labels found in F:\yolov5-7.0\mulu1\labels.cache, can not start training. See https://github.com/ultralytics/yolov5/wiki/Train-Custom-Data
#path: ../datasets/mulu1
train: mulu1/images # train images (relative to 'path') 128 images
val: mulu1/images # val images (relative to 'path') 128 images
#test: # test images (optional)