TuneSearchCV workaround for "Cannot refit estimator due to required data being missing"?

I have the following error message when using TuneSearchCV: “UserWarning: Cannot refit estimator due to required data being missing (probably due to trials not completing). best_estimator will not be set”. I believe this happens because I am using the time_budget_s parameter and not all trials complete within the budget. What is the best way to refit on the partial results?

I was hoping I could use the cv_results_ attribute, but this appears to be empty. Is there a way to access completed trials?

Update: it looks like there were no completed trials, hence the error. When there are some, the classifier is refit as expected.

That is correct, at least one trial must be fully completed for refit to occur.