ValueError: `Dataloader` returned 0 length. Please make sure that it returns at least 1 batch

[WJDNJSDJ]

Hello, I'm sorry to disturb your life. In DiffIR-inpainting with your own dataset, this error occurs. After trying, the problem was not found, and the following problems have been ruled out:

1. There is no problem with the file path or format；
2. There is no problem with the content of the dataset,；
3. The problem of the size of the dataset is not very certain.
   Please do not hesitate to advise！thanks
   [saicinpainting.training.trainers.baseS1][INFO] - BaseInpaintingTrainingModule init done
   [root][INFO] - Added key: store_based_barrier_key:1 to store for rank: 0
   [INFO] - Make val dataloader default from /home/liu/ZZB/DH_2700//Val/Val_GT
   [main][CRITICAL] - Training failed due to Dataloader returned 0 length. Please make sure that it returns at least 1 batch:
   Traceback (most recent call last):
   File "bin/train.py", line 63, in main
   trainer.fit(training_model)
   File "/home/liu/anaconda3/envs/DIFFIR/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 499, in fit
   self.dispatch()
   File "/home/liu/anaconda3/envs/DIFFIR/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 546, in dispatch
   self.accelerator.start_training(self)
   File "/home/liu/anaconda3/envs/DIFFIR/lib/python3.8/site-packages/pytorch_lightning/accelerators/accelerator.py", line 73, in start_training
   self.training_type_plugin.start_training(trainer)
   File "/home/liu/anaconda3/envs/DIFFIR/lib/python3.8/site-packages/pytorch_lightning/plugins/training_type/training_type_plugin.py", line 114, in start_training
   self._results = trainer.run_train()
   File "/home/liu/anaconda3/envs/DIFFIR/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 607, in run_train
   self.run_sanity_check(self.lightning_module)
   File "/home/liu/anaconda3/envs/DIFFIR/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 854, in run_sanity_check
   self.reset_val_dataloader(ref_model)
   File "/home/liu/anaconda3/envs/DIFFIR/lib/python3.8/site-packages/pytorch_lightning/trainer/data_loading.py", line 364, in reset_val_dataloader
   self.num_val_batches, self.val_dataloaders = self._reset_eval_dataloader(model, 'val')
   File "/home/liu/anaconda3/envs/DIFFIR/lib/python3.8/site-packages/pytorch_lightning/trainer/data_loading.py", line 325, in _reset_eval_dataloader
   num_batches = len(dataloader) if has_len(dataloader) else float('inf')
   File "/home/liu/anaconda3/envs/DIFFIR/lib/python3.8/site-packages/pytorch_lightning/utilities/data.py", line 33, in has_len
   raise ValueError('Dataloader returned 0 length. Please make sure that it returns at least 1 batch')
   ValueError: Dataloader returned 0 length. Please make sure that it returns at least 1 batch

[Zj-BinXia]

The data seems to have not been read successfully. For more details on the data, you can refer to lama at: https://github.com/advimman/lama.