Order Status Manager for WooCommerce

Could you please fix this:

str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated

wp-content/object-cache.php:2538
str_replace()
wp-content/object-cache.php:2538
WP_Object_Cache->sanitize_key_part()
wp-content/object-cache.php:2133
WP_Object_Cache->set()
wp-content/object-cache.php:294
wp_cache_set()
wp-content/plugins/woocommerce-order-status-manager/src/wc-order-status-manager-functions.php:56
wc_order_status_manager_get_order_status_posts()
wp-content/plugins/woocommerce-order-status-manager/class-wc-order-status-manager.php:259
WC_Order_Status_Manager->rename_core_order_status_labels()
wp-includes/class-wp-hook.php:324
apply_filters(‘woocommerce_register_shop_order_post_statuses’)
wp-content/plugins/woocommerce/includes/class-wc-post-types.php:625
WC_Post_Types::register_post_status()
wp-includes/class-wp-hook.php:324
do_action(‘init’)
wp-settings.php:643