woocommerce Variation not loading

Product Add On plugin has broken the product variations on my website. The variation now can’t be loaded in the backend of the website.

log file gives the following:

[03-Oct-2021 20:59:36 UTC] PHP Fatal error:  Uncaught Error: Call to a member function get_meta() on bool in /var/www/htdocs/wp-content/plugins/yith-woocommerce-advanced-product-options-premium/v1/includes/functions/yith-wccl.php:131
Stack trace:
#0 /var/www/htdocs/wp-content/plugins/yith-woocommerce-advanced-product-options-premium/v1/includes/classes/class.yith-wccl-admin.php(918): yith_wccl_get_variation_gallery()
#1 /var/www/htdocs/wp-includes/class-wp-hook.php(303): YITH_WCCL_Admin->gallery_variation_html()
#2 /var/www/htdocs/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters()
#3 /var/www/htdocs/wp-includes/plugin.php(470): WP_Hook->do_action()
#4 /var/www/htdocs/wp-content/plugins/woocommerce/includes/admin/meta-boxes/views/html-variation-admin.php(486): do_action()
#5 /var/www/htdocs/wp-content/plugins/woocommerce/includes/class-wc-ajax.php(2191): include('/var/www/htdocs...')
#6 /var/www/htdocs/wp-includes/class-wp-hook.php(303): WC_AJAX::load_variations()
#7 /var/www/htdocs/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters()
# in /var/www/htdocs/wp-content/plugins/yith-woocommerce-advanced-product-options-premium/v1/includes/functions/yith-wccl.php on line 131
[03-Oct-2021 21:00:17 UTC] PHP Fatal error:  Uncaught Error: Call to a member function get_meta() on bool in /var/www/htdocs/wp-content/plugins/yith-woocommerce-advanced-product-options-premium/v1/includes/functions/yith-wccl.php:131
Stack trace:
#0 /var/www/htdocs/wp-content/plugins/yith-woocommerce-advanced-product-options-premium/v1/includes/classes/class.yith-wccl-admin.php(918): yith_wccl_get_variation_gallery()
#1 /var/www/htdocs/wp-includes/class-wp-hook.php(303): YITH_WCCL_Admin->gallery_variation_html()
#2 /var/www/htdocs/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters()
#3 /var/www/htdocs/wp-includes/plugin.php(470): WP_Hook->do_action()
#4 /var/www/htdocs/wp-content/plugins/woocommerce/includes/admin/meta-boxes/views/html-variation-admin.php(486): do_action()
#5 /var/www/htdocs/wp-content/plugins/woocommerce/includes/class-wc-ajax.php(2191): include('/var/www/htdocs...')
#6 /var/www/htdocs/wp-includes/class-wp-hook.php(303): WC_AJAX::load_variations()
#7 /var/www/htdocs/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters()
# in /var/www/htdocs/wp-content/plugins/yith-woocommerce-advanced-product-options-premium/v1/includes/functions/yith-wccl.php on line 131