PHP Notice: Undefined index

  • Not an emergency, but as I use debug a lot, hundreds of these notices are annoying:

    PHP Notice: Undefined index: zip in /home/XXXXXXXXXX/wp-content/plugins/pixel-caffeine/includes/supports/class-aepc-edd-addon-support.php on line 408
    [22-Mar-2021 16:36:27 UTC] PHP Notice: Undefined index: state in /home/XXXXXXXXXX/wp-content/plugins/pixel-caffeine/includes/supports/class-aepc-edd-addon-support.php on line 407

    Seems to occur during purchases on Easy Digital Downloads.

    A little guidance would be much appreciated.

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