When I schedule a coupon it gives me a critical error. Is there a fix for this?
Error Details
=============
An error of type E_ERROR was caused in line 601 of the file /www/wp-content/plugins/woocommerce-points-and-rewards/includes/class-wc-points-rewards-cart-checkout.php. Error message: Uncaught Error: Call to a member function calculate_totals() on null in /www/wp-content/plugins/woocommerce-points-and-rewards/includes/class-wc-points-rewards-cart-checkout.php:601
Stack trace:
#0 /www/wp-content/plugins/woocommerce-points-and-rewards/includes/class-wc-points-rewards-discount.php(68): WC_Points_Rewards_Cart_Checkout::get_discount_for_redeeming_points(true, NULL, false, ”)
#1 /wordpress/wp-includes/class-wp-hook.php(289): WC_Points_Rewards_Discount->get_discount_data(false, ”)
#2 /wordpress/wp-includes/plugin.php(206): WP_Hook->apply_filters(false, Array)
#3 /www/wp-content/plugins/woocommerce/includes/class-wc-coupon.php(94): apply_filters(‘woocommerce_get…’, false, ”, Object(WC_Coupon))
#4 /www/wp-content/plugins/woocommerce-subscriptions/includes/class-wc-subscriptions-coupon.php(831): WC_Coupon->__construct(”)
#5 /www/wp-content/plugins/woocommerce-subscriptions/includes/class-wc-subscriptions-coupon.php(1073): WC_Subscriptions_Coupon::get_coupon_limit(”)
#6 /wordpress/wp-includes/