PHP Error message after last update

  • I get following error message in my debug.log since the last update

    Undefined array key "hierarchical" in C:\xampp\htdocs\dev.my-race-instructor.local\wp-content\plugins\acf-frontend-form-element\main\frontend\fields\general\class-related-terms.php on line 550

    Using ACF Pro and TwentyTwentyThree as template.

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