Error: raise MisconfigurationException(f"No `{loader_name}()` method defined to run `Trainer.{trainer_method}`.")

[homanp]

Tried running your instructions for GCP but end up getting this error when the training the model. Any ideas how to resolve?

Traceback (most recent call last):
  File "main.py", line 835, in <module>
    trainer.test(model, data)
  File "/opt/conda/envs/ldm/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 911, in test
    return self._call_and_handle_interrupt(self._test_impl, model, dataloaders, ckpt_path, verbose, datamodule)
  File "/opt/conda/envs/ldm/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 685, in _call_and_handle_interrupt
    return trainer_fn(*args, **kwargs)
  File "/opt/conda/envs/ldm/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 954, in _test_impl
    results = self._run(model, ckpt_path=self.tested_ckpt_path)
  File "/opt/conda/envs/ldm/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 1128, in _run
    verify_loop_configurations(self)
  File "/opt/conda/envs/ldm/lib/python3.8/site-packages/pytorch_lightning/trainer/configuration_validator.py", line 42, in verify_loop_configurations
    __verify_eval_loop_configuration(trainer, model, "test")
  File "/opt/conda/envs/ldm/lib/python3.8/site-packages/pytorch_lightning/trainer/configuration_validator.py", line 186, in __verify_eval_loop_configuration
    raise MisconfigurationException(f"No `{loader_name}()` method defined to run `Trainer.{trainer_method}`.")
pytorch_lightning.utilities.exceptions.MisconfigurationException: No `test_dataloader()` method defined to run `Trainer.test`.