string parsing error

src/backend/run_eval_suite_harness.py

@@ -81,7 +81,7 @@ def run_evaluation(eval_request: EvalRequest, task_names: list, num_fewshot: int
         device=device,
         limit=limit,
         write_out=True,
-        gen_kwargs="max_new_tokens=None"
+        gen_kwargs="max_new_tokens=400"
     )
 
     # TODO: For Toxicity, substract from 100.