There has been a fatal PHP error

Hi there,

we have PHP 8 and get this Error during 2nd Article listing on eBay.

<b>There has been a fatal PHP error – the server said:</b><br><span style=”color:darkred”>Uncaught TypeError: Cannot access offset of type string on string in /var/www/vhosts/mydomain.com/httpdocs/wp-content/plugins/wp-lister-for-ebay/classes/model/ItemBuilderModel.php:967 Stack trace: #0 /var/www/vhosts/mydomain.com/httpdocs/wp-content/plugins/wp-lister-for-ebay/classes/model/ItemBuilderModel.php(141): ItemBuilderModel->buildPayment() #1 /var/www/vhosts/mydomain.com/httpdocs/wp-content/plugins/wp-lister-for-ebay/classes/model/ListingsModel.php(343): ItemBuilderModel->buildItem() #2 /var/www/vhosts/mydomain.com/httpdocs/wp-content/plugins/wp-lister-for-ebay/classes/core/EbayController.php(700): ListingsModel->addItem() #3 /var/www/vhosts/mydomain.com/httpdocs/wp-content/plugins/wp-lister-for-ebay/classes/core/WPL_AjaxHandler.php(593): EbayController->sendItemsToEbay() #4 /var/www/vhosts/mydomain.com/httpdocs/wp-includes/class-wp-hook.php(303): WPL_AjaxHandler->jobs_run_task() #5 /var/www/vhosts/mydomain.com/httpdocs/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters() #6 /var/www/vhosts/mydomain.com/httpdocs/wp-includes/plugin.php(470): WP_Hook->do_action() #7 /var/www/vhosts/mydomain.com/httpdocs/wp-admin/admin-ajax.php(187): do_action() #8 {main} thrown</span><br>In file: /var/www/vhosts/mydomain.com/httpdocs/wp-content/plugins/wp-lister-for-ebay/classes/model/ItemBuilderModel.php (line 967)<br><br><b>Please contact support in order to resolve this.</b><br>If this error is related to memory limits or timeouts, you need to contact your server administrator or hosting provider.<br>