'Encoder' object has no attribute 'tx_proj'

I was successfully able to run the LSTM based pointer generator. While running the transformer_encoder branch with LSTM=false, I encounter this error:
```
File "training_ptr_gen/train.py", line 400, in
train_processor.trainIters(config.max_iterations, args.model_file_path)
File "training_ptr_gen/train.py", line 341, in trainIters
loss = self.train_one_batch(batch)
File "training_ptr_gen/train.py", line 273, in train_one_batch
encoder_outputs, encoder_feature, encoder_hidden = self.model.encoder(enc_batch, enc_lens, enc_padding_mask)
File "/srv/home/kaur/pointer_summarizer/lstmpg/lib/python3.6/site-packages/torch/nn/modules/module.py", line 727, in _call_impl
result = self.forward(*input, **kwargs)
File "/srv/home/kaur/pointer_summarizer/training_ptr_gen/model.py", line 108, in forward
word_embed_proj = self.tx_proj(embedded)
File "/srv/home/kaur/pointer_summarizer/lstmpg/lib/python3.6/site-packages/torch/nn/modules/module.py", line 779, in __getattr__
type(self).__name__, name))
torch.nn.modules.module.ModuleAttributeError: 'Encoder' object has no attribute 'tx_proj'
```
Any help regarding this would be appreciated, thanks.