Fatal error: Uncaught Error: Call to undefined function yith_plugin_fw_wc_is_using_block_template_in_single_product() in /home/klient.dhosting.pl/marysia/sklep.psychologmarialucjan.pl/public_html/wp-content/plugins/yith-woocommerce-compare/includes/class.yith-woocompare-frontend.php:113 Stack trace: #0 /home/klient.dhosting.pl/marysia/sklep.psychologmarialucjan.pl/public_html/wp-content/plugins/yith-woocommerce-compare/includes/class.yith-woocompare.php(54): YITH_Woocompare_Frontend->__construct() #1 /home/klient.dhosting.pl/marysia/sklep.psychologmarialucjan.pl/public_html/wp-content/plugins/yith-woocommerce-compare/init.php(139): YITH_Woocompare->__construct() #2 /home/klient.dhosting.pl/marysia/sklep.psychologmarialucjan.pl/public_html/wp-includes/class-wp-hook.php(308): yith_woocompare_constructor('') #3 /home/klient.dhosting.pl/marysia/sklep.psychologmarialucjan.pl/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array) #4 /home/klient.dhosting.pl/marysia/sklep.psychologmarialucjan.pl/publ in /home/klient.dhosting.pl/marysia/sklep.psychologmarialucjan.pl/public_html/wp-content/plugins/yith-woocommerce-compare/includes/class.yith-woocompare-frontend.php on line 113