Illegal offset type [a warning]

  • After version 4.0.x, when debug mode is turned on, a warning will appear:

    Illegal offset type in isset or empty in wp-includes/class-wp-customize-manager.php

    Thanks.

    ———My environment———
    WP: 6.0+
    Kirki: 4.0+
    PHP: 7.2+

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