boost55

Same problem, had to inaktivaite YITH WOOCOMMERCE POPUP.

WordPress-version 5.6.2
Tema: Gecko (version 1.8.6)
Nuvarande tillägg: YITH WooCommerce Popup (version 1.5.1)
PHP-version 7.4.15

==================
Ett fel av typen E_ERROR uppstod på rad 287 i följande fil: /var/www/vhosts/vaskbutiken.se/httpdocs/wp-content/plugins/yith-woocommerce-popup/includes/newsletter-integration/Mailchimp.php. Felorsak: Uncaught TypeError: Return value of YITH_Popup_Newsletter_Mailchimp::get_mailchimp_lists() must be an instance of mixed, bool returned in /var/www/vhosts/vaskbutiken.se/httpdocs/wp-content/plugins/yith-woocommerce-popup/includes/newsletter-integration/Mailchimp.php:287
Stack trace:
#0 /var/www/vhosts/vaskbutiken.se/httpdocs/wp-content/plugins/yith-woocommerce-popup/includes/newsletter-integration/Mailchimp.php(145): YITH_Popup_Newsletter_Mailchimp->get_mailchimp_lists()
#1 /var/www/vhosts/vaskbutiken.se/httpdocs/wp-includes/class-wp-hook.php(287): YITH_Popup_Newsletter_Mailchimp->add_metabox_field()
#2 /var/www/vhosts/vaskbutiken.se/httpdocs/wp-includes/plugin.php(212): WP_Hook->apply_filters()
#3 /var/www/vhosts/vaskbutiken.se/httpdocs/wp-content/plugins/yith-woocommerce-popup/plugin-options/metabox/ypop_metabox.php(296): apply_filters()
#4 /var/www/vhosts/vaskbutiken.se/httpdocs/wp-content/plugins/yith-woocommerce-popup/includes/class-yith-popup.php(216): require_once('/var/www/vhosts...')
#5 /var/www/vhost