"evaluation_strategy" has been deprecated since version 4.46 of the Hugging Face Transformers library. https://github.com/huggingface/transformers/pull/30190

Changing evaluation_strategy="" to eval_strategy="" should fix the unexpected argument issue.

Your configuration for the 6-label classifier looks correct (num_labels=6, problem_type="multi_label_classification"). If you run into any errors, please share the traceback for further assistance.