hey @JakeMSc
this error is a bit odd because it suggests the Trainer.init_git_repo function is not being called which can only happen if TrainingArguments.push_to_hub is not set to True.
in particular, i could not reproduce your error by pushing a seq2seq model to the hub with the official translation tutorial here: Google Colaboratory
perhaps you can also try running the push to hub part of the tutorial notebook in your environment to see if it’s a problem in your configuration?