Grader error C3_w2_q4 "check std error" usual methods tried. What to do?

Course Q&A Natural Language Processing NLP with Sequence Models
1

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I get this grader error “check stderr”. i have tried the usual fixes (get clean notebook, copy & paste code, no extra cells) but it does not help. Any suggestions??

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You’re passing the wrong argument for data_lines for both bare_train_generator and bare_eval_generator. Use the function parameters lines and eval_lines.
Please remove references to your code once you’re done fixing the bugs.