AttributeError: 'NoneType' object has no attribute 'encodels'

[dddlli]

Traceback (most recent call last):
File "/root/miniconda3/lib/python3.8/runpy.py", line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/root/miniconda3/lib/python3.8/runpy.py", line 87, in _run_code
exec(code, run_globals)
File "/root/PLNet-master/hawp/fsl/train.py", line 271, in
train(cfg, model, train_dataset, optimizer, scheduler, loss_reducer, checkpointer, arguments)
File "/root/PLNet-master/hawp/fsl/train.py", line 117, in train
loss_dict, extra_info = model(images,annotations)
File "/root/miniconda3/lib/python3.8/site-packages/torch/nn/modules/module.py", line 1110, in _call_impl
return forward_call(*input, **kwargs)
File "/root/PLNet-master/hawp/fsl/model/models.py", line 215, in forward
return self.forward_train(images, annotations=annotations)
File "/root/PLNet-master/hawp/fsl/model/models.py", line 540, in forward_train
targets , metas = self.hafm_encoder(annotations)
File "/root/PLNet-master/hawp/fsl/model/hafm.py", line 18, in call
t,m = self._process_per_image(ann)
File "/root/PLNet-master/hawp/fsl/model/hafm.py", line 67, in _process_per_image
lmap, _, _ = _C.encodels(lines,height,width,height,width,lines.size(0))
AttributeError: 'NoneType' object has no attribute 'encodels'