diff --git a/plugins/woocommerce/includes/class-wc-brands-coupons.php b/plugins/woocommerce/includes/class-wc-brands-coupons.php
index 065ec3e0de7..d65dc334647 100644
--- a/plugins/woocommerce/includes/class-wc-brands-coupons.php
+++ b/plugins/woocommerce/includes/class-wc-brands-coupons.php
@@ -69,17 +69,17 @@ class WC_Brands_Coupons {
 
 		// 1) Coupon has a brand requirement but no products in the cart have the brand.
 		if ( ! $included_brands_match && ! empty( $brand_coupon_settings['included_brands'] ) ) {
-			throw new Exception( WC_Coupon::E_WC_COUPON_NOT_APPLICABLE ); // phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped
+			throw new Exception( $coupon->get_coupon_error( WC_Coupon::E_WC_COUPON_NOT_APPLICABLE ), WC_Coupon::E_WC_COUPON_NOT_APPLICABLE ); // phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped
 		}
 
 		// 2) All products in the cart match brand exclusion rule.
 		if ( count( $items ) === $excluded_brands_matches ) {
-			throw new Exception( self::E_WC_COUPON_EXCLUDED_BRANDS ); // phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped
+			throw new Exception( __( 'Sorry, this coupon is not applicable to the brands of selected products.', 'woocommerce' ), self::E_WC_COUPON_EXCLUDED_BRANDS ); // phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped
 		}
 
 		// 3) For a cart discount, there is at least one product in cart that matches exclusion rule.
 		if ( $coupon->is_type( 'fixed_cart' ) && $excluded_brands_matches > 0 ) {
-			throw new Exception( self::E_WC_COUPON_EXCLUDED_BRANDS ); // phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped
+			throw new Exception( __( 'Sorry, this coupon is not applicable to the brands of selected products.', 'woocommerce' ), self::E_WC_COUPON_EXCLUDED_BRANDS ); // phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped
 		}
 
 		return $valid;
diff --git a/plugins/woocommerce/readme.txt b/plugins/woocommerce/readme.txt
index 94831953d50..19773211970 100644
--- a/plugins/woocommerce/readme.txt
+++ b/plugins/woocommerce/readme.txt
@@ -173,6 +173,7 @@ WooCommerce comes with some sample data you can use to see how products look; im
 
 **WooCommerce**
 
+* Fix - Resolved fatal error when applying Brands-restricted coupon [#51577](https://github.com/woocommerce/woocommerce/pull/51577)
 * Fix - Fix CSS issue with Safari 18.0 on the product form page. [#51734](https://github.com/woocommerce/woocommerce/pull/51734)
 * Fix - Add a new notice to the plugins list for products used without subscriptions reminding them to purchase. [#51060](https://github.com/woocommerce/woocommerce/pull/51060)
 * Fix - Added missing wp-block- classes to order confirmation, store notices, and breadcrumb blocks. [#51380](https://github.com/woocommerce/woocommerce/pull/51380)