Quote
the above variable is incorrect, as it should be one of the following:
FILENAME_CHECKOUT_CONFIRMATION
FILENAME_CHECKOUT_PAYMENT
FILENAME_CHECKOUT_PAYMENT_ADDRESS
FILENAME_CHECKOUT_PROCESS
FILENAME_CHECKOUT_SHIPPING
FILENAME_CHECKOUT_SHIPPING_ADDRESS
FILENAME_CHECKOUT_SUCCESS
To correct you can do the following:
open the /catalog/includes/filenames.php file and find the following:
define('FILENAME_ALSO_PURCHASED_PRODUCTS', 'also_purchased_products.php');
after above line add the following code:
define('FILENAME_CHECKOUT', 'checkout_confirmation.php');
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