How to fix the “Warning: Class ‘Automattic\WooCommerce\StoreApi\Routes” issue in WordPress + WooCommerce

Today when I visited a customer’s website, I saw an error similar to this:

Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\CartRemoveCoupon' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 52
Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\CartRemoveItem' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 53
Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\CartSelectShippingRate' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 54
Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\CartUpdateCustomer' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 55
Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\CartUpdateItem' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 56
Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\Checkout' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 57
Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\ProductAttributes' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 58
Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\ProductAttributesById' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 59
Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\ProductAttributeTerms' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 60
Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\ProductCategories' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 61
Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\ProductCategoriesById' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 62
Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\ProductCollectionData' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 63
Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\ProductReviews' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 64
Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\Products' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 65
Warning: Class 'Automattic\WooCommerce\StoreApi\Routes\V1\ProductsById' not found in /public_html/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/StoreApi/deprecated.php on line 66

etc.

After trying all sorts of troubleshooting, the solution ended up being simple. Download a fresh copy of WooCommerce from WordPress.org and FTP it up to the server, replacing the existing WooCommerce files. Problem solved.

Isn’t that nice?

Many thanks to imrchk for the tip!

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The Mighty Mo! Design Co.

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