PHP eror

Hi, I’m trying to create a feed, but I get a PHP error when I click “Save” on the Field Mapping screen. This is the error:

https://prnt.sc/zXPLdO7GBsIr

Here’s some more details of my website and the plugin:

October 2, 2023, 10:50 am
Array
(
    [PHP] => 8.1
    [Wordpress] => 6.2
    [WooCommerce] => 8.1.1
    [WooCommerce Product Feed PRO] => 12.9.5
)
Array
(
    [Single products] => 42
    [Variation products] => 0
    [Total products] => 42
)

System check Status
WP-Cron enabled True
PHP-version True (8.1)
Product feed directory writable True
Product feed XML directory writable Unknown
Product feed CSV directory writable Unknown
Product feed TXT directory writable Unknown
Product feed TSV directory writable Uknown
Product feed LOGS directory writable True