TypeError: cannot unpack non-iterable NoneType object

[rabeehk]

Hi
I am running finetuning for IMDB I am getting this error, thanks for your help

 File "main.py", line 70, in train
    trainer.fit(model)
  File "/opt/conda/envs/test/lib/python3.7/site-packages/pytorch_lightning/trainer/trainer.py", line 440, in fit
    results = self.accelerator_backend.train()
  File "/opt/conda/envs/test/lib/python3.7/site-packages/pytorch_lightning/accelerators/gpu_accelerator.py", line 54, in train
    results = self.train_or_test()
  File "/opt/conda/envs/test/lib/python3.7/site-packages/pytorch_lightning/accelerators/accelerator.py", line 68, in train_or_test
    results = self.trainer.train()
  File "/opt/conda/envs/test/lib/python3.7/site-packages/pytorch_lightning/trainer/trainer.py", line 485, in train
    self.train_loop.run_training_epoch()
  File "/opt/conda/envs/test/lib/python3.7/site-packages/pytorch_lightning/trainer/training_loop.py", line 544, in run_training_epoch
    batch_output = self.run_training_batch(batch, batch_idx, dataloader_idx)
  File "/opt/conda/envs/test/lib/python3.7/site-packages/pytorch_lightning/trainer/training_loop.py", line 713, in run_training_batch
    self.optimizer_step(optimizer, opt_idx, batch_idx, train_step_and_backward_closure)
  File "/opt/conda/envs/test/lib/python3.7/site-packages/pytorch_lightning/trainer/training_loop.py", line 453, in optimizer_step
    optimizer, batch_idx, opt_idx, train_step_and_backward_closure
  File "/opt/conda/envs/test/lib/python3.7/site-packages/pytorch_lightning/accelerators/accelerator.py", line 122, in optimizer_step
    using_lbfgs=is_lbfgs
TypeError: optimizer_step() got an unexpected keyword argument 'using_native_amp'
Exception ignored in: <function tqdm.__del__ at 0x7fc3337da9e0>
Traceback (most recent call last):
  File "/opt/conda/envs/test/lib/python3.7/site-packages/tqdm/std.py", line 1128, in __del__
  File "/opt/conda/envs/test/lib/python3.7/site-packages/tqdm/std.py", line 1341, in close
  File "/opt/conda/envs/test/lib/python3.7/site-packages/tqdm/std.py", line 1520, in display
  File "/opt/conda/envs/test/lib/python3.7/site-packages/tqdm/std.py", line 1131, in __repr__
  File "/opt/conda/envs/test/lib/python3.7/site-packages/tqdm/std.py", line 1481, in format_dict
TypeError: cannot unpack non-iterable NoneType object