Getting Assertion Error while using panoptic segmentation

[plutus123]

!python panoptic/train.py --workers 8 --device 0 --batch 32 --data WALL-INSTANCEE-2/data.yaml --img 640 --cfg models/panoptic/gelan-c-pan-custom.yaml --weights '' --name gelan-c-pan --hyp hyp.scratch-high.yaml --no-overlap --epochs 100 --close-mosaic 10

train: New cache created: /workspace/yolov9-pan/WALL-INSTANCEE-2/train/stuff_stuff.cache
Traceback (most recent call last):
File "/workspace/yolov9-pan/panoptic/train.py", line 662, in
main(opt)
File "/workspace/yolov9-pan/panoptic/train.py", line 558, in main
train(opt.hyp, opt, device, callbacks)
File "/workspace/yolov9-pan/panoptic/train.py", line 169, in train
train_loader, dataset = create_dataloader(
File "/workspace/yolov9-pan/utils/panoptic/dataloaders.py", line 49, in create_dataloader
dataset = LoadImagesAndLabelsAndMasks(
File "/workspace/yolov9-pan/utils/panoptic/dataloaders.py", line 150, in init
assert (0 < nf) or (not augment), f'{prefix}No labels found in {cache_path}, can not start training. {HELP_URL}'
AssertionError: train: No labels found in /workspace/yolov9-pan/WALL-INSTANCEE-2/train/stuff_stuff.cache, can not start training. See https://github.com/ultralytics/yolov5/wiki/Train-Custom-Data