Can’t add no basket

Hi, We installed the latest version of Mailer Lite for Woocommerce. Are on PHP Version 7.4, updated to latest woocommerce but we get these errors – I also tried version 1.5.7 but that didn’t help
Are you able to release a fixed version?

AH01071: Got error 'PHP message: PHP Fatal error:  Uncaught Error: Class 'MailerLite_Woo\\MailerLiteApi\\MailerLite' not found in /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/shared/mailerlite-wp-functions.php:404\nStack trace:\n#0 /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/functions.php(828): mailerlite_wp_send_cart(Array)\n#1 /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/hooks.php(85): woo_ml_send_cart()\n#2 /home/sites/10b/f/f491de8cbc/public_html/wp-includes/class-wp-hook.php(305): woo_ml_proceed_to_checkout('5d75b942ab4bd73...')\n#3 /home/sites/10b/f/f491de8cbc/public_html/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array)\n#4 /home/sites/10b/f/f491de8cbc/public_html/wp-includes/plugin.php(470): WP_Hook->do_action(Array)\n#5 /home/sites/10b/f
AH01071: Got error 'PHP message: PHP Fatal error:  Uncaught Error: Class 'MailerLite_Woo\\MailerLiteApi\\MailerLite' not found in /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/shared/mailerlite-wp-functions.php:404\nStack trace:\n#0 /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/functions.php(828): mailerlite_wp_send_cart(Array)\n#1 /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/hooks.php(85): woo_ml_send_cart()\n#2 /home/sites/10b/f/f491de8cbc/public_html/wp-includes/class-wp-hook.php(305): woo_ml_proceed_to_checkout('5d75b942ab4bd73...')\n#3 /home/sites/10b/f/f491de8cbc/public_html/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array)\n#4 /home/sites/10b/f/f491de8cbc/public_html/wp-includes/plugin.php(470): WP_Hook->do_action(Array)\n#5 /home/sites/10b/f
AH01071: Got error 'PHP message: PHP Fatal error:  Uncaught Error: Class 'MailerLite_Woo\\MailerLiteApi\\MailerLite' not found in /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/shared/mailerlite-wp-functions.php:404\nStack trace:\n#0 /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/functions.php(828): mailerlite_wp_send_cart(Array)\n#1 /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/hooks.php(85): woo_ml_send_cart()\n#2 /home/sites/10b/f/f491de8cbc/public_html/wp-includes/class-wp-hook.php(305): woo_ml_proceed_to_checkout('c0f971d8cd24364...')\n#3 /home/sites/10b/f/f491de8cbc/public_html/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array)\n#4 /home/sites/10b/f/f491de8cbc/public_html/wp-includes/plugin.php(470): WP_Hook->do_action(Array)\n#5 /home/sites/10b/f/f491de8cbc/public_html
AH01071: Got error 'PHP message: PHP Warning:  sizeof(): Parameter must be an array or an object that implements Countable in /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/shared/mailerlite-wp-functions.php on line 38'
AH01071: Got error 'PHP message: PHP Fatal error:  Uncaught Error: Class 'MailerLite_Woo\\MailerLiteApi\\MailerLite' not found in /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/shared/mailerlite-wp-functions.php:404\nStack trace:\n#0 /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/functions.php(828): mailerlite_wp_send_cart(Array)\n#1 /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/hooks.php(85): woo_ml_send_cart()\n#2 /home/sites/10b/f/f491de8cbc/public_html/wp-includes/class-wp-hook.php(305): woo_ml_proceed_to_checkout('a65b6e5acc06513...')\n#3 /home/sites/10b/f/f491de8cbc/public_html/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array)\n#4 /home/sites/10b/f/f491de8cbc/public_html/wp-includes/plugin.php(470): WP_Hook->do_action(Array)\n#5 /home/sites/10b/f
AH01071: Got error 'PHP message: PHP Warning:  sizeof(): Parameter must be an array or an object that implements Countable in /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/shared/mailerlite-wp-functions.php on line 38'
AH01071: Got error 'PHP message: PHP Warning:  sizeof(): Parameter must be an array or an object that implements Countable in /home/sites/10b/f/f491de8cbc/public_html/wp-content/plugins/woo-mailerlite/includes/shared/mailerlite-wp-functions.php on line 38'