We are experiencing an error when visitors use a coupon code that gives them 100% discount on our product. The discount is taken off but when we go through the final payment page, an error message appears:
Things don't appear to be working at the moment. Please try again later.
The URL of the error page: https://www.paypal.com/webapps/shoppingcart/error?flowlogging_id=a9e37a10bda6b&code=AMOUNT_ERROR&mfi...
This is the hidden form data of the payment page (before the error)
<form action="https://www.paypal.com/cgi-bin/webscr&pal=V4T754QB63XXL" method="post">
<input type="hidden" name="cmd" value="_cart">
<input type="hidden" name="upload" value="1">
<input type="hidden" name="business" value="....">
<input type="hidden" name="item_name_1" value="PickNix Meal Box">
<input type="hidden" name="item_number_1" value="1">
<input type="hidden" name="amount_1" value="12.99">
<input type="hidden" name="quantity_1" value="1">
<input type="hidden" name="weight_1" value="0">
<input type="hidden" name="on0_1" value="Timestamp">
<input type="hidden" name="os0_1" value="1534943285">
<input type="hidden" name="on1_1" value="Base">
<input type="hidden" name="os1_1" value="Wholewheat Cous Cous">
<input type="hidden" name="on2_1" value="Protein">
<input type="hidden" name="os2_1" value="Halloumi">
<input type="hidden" name="on3_1" value="Salad 1">
<input type="hidden" name="os3_1" value="Greek Salad">
<input type="hidden" name="on4_1" value="Salad 2">
<input type="hidden" name="os4_1" value="Roasted Squash Pomeg..">
<input type="hidden" name="on5_1" value="Sauce">
<input type="hidden" name="os5_1" value="Tomato Salsa">
<input type="hidden" name="item_name_2" value="Collection">
<input type="hidden" name="item_number_2" value="1">
<input type="hidden" name="amount_2" value="0">
<input type="hidden" name="quantity_2" value="1">
<input type="hidden" name="weight_2" value="0">
<input type="hidden" name="discount_amount_cart" value="12.99">
<input type="hidden" name="currency_code" value="GBP">
<input type="hidden" name="first_name" value="Kenny">
<input type="hidden" name="last_name" value="Foster">
<input type="hidden" name="address1" value="139 Fairview Road">
<input type="hidden" name="address2" value="60 ST. Georges Place">
<input type="hidden" name="city" value="Cheltenham ">
<input type="hidden" name="zip" value="Gl52 2ex ">
<input type="hidden" name="country" value="GB">
<input type="hidden" name="address_override" value="0">
<input type="hidden" name="email" value="...">
<input type="hidden" name="invoice" value="226 - Kenny Foster">
<input type="hidden" name="lc" value="en-gb">
<input type="hidden" name="rm" value="2">
<input type="hidden" name="no_note" value="1">
<input type="hidden" name="no_shipping" value="1">
<input type="hidden" name="charset" value="utf-8">
<input type="hidden" name="return" value="http://picknix.thirdfloordigital.net/order/index.php?route=checkout/success">
<input type="hidden" name="notify_url" value="http://picknix.thirdfloordigital.net/order/index.php?route=extension/payment/pp_standard/callback">
<input type="hidden" name="cancel_return" value="http://picknix.thirdfloordigital.net/order/index.php?route=checkout/checkout">
<input type="hidden" name="paymentaction" value="sale">
<input type="hidden" name="custom" value="226">
<input type="hidden" name="bn" value="OpenCart_2.0_WPS">
<div class="buttons">
<div class="pull-right">
<input type="submit" value="Confirm Order" class="btn btn-primary">
</div>
</div>
</form>
