Edit popup causes critical error

Hi,

I use the popup plugin for years, it always works perfectly. Today I wanted to edit the contents of the popup but I get I a critical error. When I look into the logs I see this error below. I suppose it has something to do with mailchimp but I can’t change any setting. What’s wrong?

Mailchimp_Error: Mailchimp API versions 2.0 and Export 1.0 are no longer available. For more information see https://mailchi.mp/7a37f04b6eb2/api-export-10-and-api-20-retirement in /data/sites/web/angeliquevandewinkelbe/www/wp-content/plugins/yith-woocommerce-popup/includes/vendor/mailchimp/Mailchimp.php:357 Stack trace: #0 /data/sites/web/angeliquevandewinkelbe/www/wp-content/plugins/yith-woocommerce-popup/includes/vendor/mailchimp/Mailchimp.php(332): Mailchimp->castError(Array) #1 /data/sites/web/angeliquevandewinkelbe/www/wp-content/plugins/yith-woocommerce-popup/includes/newsletter-integration/Mailchimp.php(316): Mailchimp->call(‘lists/list’, ‘{“apikey”:”b8b3…’) #2 /data/sites/web/angeliquevandewinkelbe/www/wp-content/plugins/yith-woocommerce-popup/includes/newsletter-integration/Mailchimp.php(275): YITH_Popup_Newsletter_Mailchimp->set_mailchimp_lists(‘b8b39c4cc79d3e0…’, 6566) #3 /data/sites/web/angeliquevandewinkelbe/www/wp-content/plugins/yith-woocommerce-popup/includes/newsletter-integratio