Shipping Surcharge [Support Thread]

[njcyx]

Another issue, but it is not critical to me.

Under the order-total, there is an option under this surcharge plug-in: Charge a Shipping Surcharge. By default, it is set to true. I checked my checkout page, and the surcharge only applied to the sub-total number. Shipping is not included. But anyway, I don't plan to apply surcharge on the shipping.

If I set this option to false, surcharge option is missing under the OPC checkout page. If I select different shipping options, the following warning is generated.

[19-Apr-2025 11:30:15 America/New_York] PHP Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /includes/classes/order_total.php:143
Stack trace:
#0 /includes/classes/ajax/zcAjaxOnePageCheckout.php(428): order_total->output()
#1 /includes/classes/ajax/zcAjaxOnePageCheckout.php(92): zcAjaxOnePageCheckout->createOrderTotalHtml()
#2 /ajax.php(92): zcAjaxOnePageCheckout->updateShippingSelection()
#3 {main}
thrown in /includes/classes/order_total.php on line 143

[19-Apr-2025 11:30:15 America/New_York] Request URI: /ajax.php?act=ajaxOnePageCheckout&method=updateShippingSelection, IP address: xxxx
--> PHP Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /includes/classes/order_total.php:143
Stack trace:
#0 /includes/classes/ajax/zcAjaxOnePageCheckout.php(428): order_total->output()
#1 /includes/classes/ajax/zcAjaxOnePageCheckout.php(92): zcAjaxOnePageCheckout->createOrderTotalHtml()
#2 /ajax.php(92): zcAjaxOnePageCheckout->updateShippingSelection()
#3 {main}
thrown in /includes/classes/order_total.php on line 143. 

Line 143 in order_total.php is the following in my code:

 $size = count($GLOBALS[$class]->output);