Hi, this a new 2.3.4 install with some mods: PWA and Order Editor.   In case of free shipping I get these errors at checkout:   PHP Notice:  Undefined variable: free in /opt/lampp/htdocs/studio/catalog/checkout_shipping.php on line 116
PHP Stack trace:
PHP   1. {main}() /opt/lampp/htdocs/studio/catalog/checkout_shipping.php:0
PHP Notice:  Undefined index: free in /opt/lampp/htdocs/studio/catalog/includes/modules/order_total/ot_shipping.php on line 51
PHP Stack trace:
PHP   1. {main}() /opt/lampp/htdocs/studio/catalog/checkout_confirmation.php:0
PHP   2. order_total->process() /opt/lampp/htdocs/studio/catalog/checkout_confirmation.php:69
PHP   3. ot_shipping->process() /opt/lampp/htdocs/studio/catalog/includes/classes/order_total.php:42
PHP Notice:  Trying to get property of non-object in /opt/lampp/htdocs/studio/catalog/includes/modules/order_total/ot_shipping.php on line 51
PHP Stack trace:
PHP   1. {main}() /opt/lampp/htdocs/studio/catalog/checkout_confirmation.php:0
PHP   2. order_total->process() /opt/lampp/htdocs/studio/catalog/checkout_confirmation.php:69
PHP   3. ot_shipping->process() /opt/lampp/htdocs/studio/catalog/includes/classes/order_total.php:42
  I found an old archived post related. A fix was pointed out. The link, however, points to an empty page.   I'm sure this is quite trivial to you, but I haven't yet found a solution.   Thanks