Ok it works and sends the order through. Other than the short PHP Notice I posted above this new log appeared...
Code:
[05-Jun-2019 14:55:36 America/Chicago] Request URI: /NewStorey/index.php?main_page=checkout_process, IP address: 72.182.165.112
#1  strpos() called at [/home/goodiesbygail/public_html/NewStorey/includes/classes/order.php:681]
#2  order->create() called at [/home/goodiesbygail/public_html/NewStorey/includes/modules/checkout_process.php:88]
#3  require(/home/goodiesbygail/public_html/NewStorey/includes/modules/checkout_process.php) called at [/home/goodiesbygail/public_html/NewStorey/includes/modules/pages/checkout_process/header_php.php:14]
#4  require(/home/goodiesbygail/public_html/NewStorey/includes/modules/pages/checkout_process/header_php.php) called at [/home/goodiesbygail/public_html/NewStorey/index.php:36]
--> PHP Warning: strpos() expects parameter 1 to be string, array given in /home/goodiesbygail/public_html/NewStorey/includes/classes/order.php on line 681.

[05-Jun-2019 14:55:36 America/Chicago] Request URI: /NewStorey/index.php?main_page=checkout_process, IP address: 72.182.165.112
#1  mysqli_real_escape_string() called at [/home/goodiesbygail/public_html/NewStorey/includes/classes/db/mysql/query_factory.php:122]
#2  queryFactory->prepare_input() called at [/home/goodiesbygail/public_html/NewStorey/includes/classes/db/mysql/query_factory.php:516]
#3  queryFactory->prepareInput() called at [/home/goodiesbygail/public_html/NewStorey/includes/functions/functions_general.php:896]
#4  zen_db_input() called at [/home/goodiesbygail/public_html/NewStorey/includes/functions/functions_general.php:929]
#5  zen_db_perform() called at [/home/goodiesbygail/public_html/NewStorey/includes/classes/order.php:696]
#6  order->create() called at [/home/goodiesbygail/public_html/NewStorey/includes/modules/checkout_process.php:88]
#7  require(/home/goodiesbygail/public_html/NewStorey/includes/modules/checkout_process.php) called at [/home/goodiesbygail/public_html/NewStorey/includes/modules/pages/checkout_process/header_php.php:14]
#8  require(/home/goodiesbygail/public_html/NewStorey/includes/modules/pages/checkout_process/header_php.php) called at [/home/goodiesbygail/public_html/NewStorey/index.php:36]
--> PHP Warning: mysqli_real_escape_string() expects parameter 2 to be string, array given in /home/goodiesbygail/public_html/NewStorey/includes/classes/db/mysql/query_factory.php on line 122.

[05-Jun-2019 14:55:36 America/Chicago] Request URI: /NewStorey/index.php?main_page=checkout_process, IP address: 72.182.165.112
#1  strpos() called at [/home/goodiesbygail/public_html/NewStorey/includes/classes/order.php:1068]
#2  order->send_order_email() called at [/home/goodiesbygail/public_html/NewStorey/includes/modules/checkout_process.php:97]
#3  require(/home/goodiesbygail/public_html/NewStorey/includes/modules/checkout_process.php) called at [/home/goodiesbygail/public_html/NewStorey/includes/modules/pages/checkout_process/header_php.php:14]
#4  require(/home/goodiesbygail/public_html/NewStorey/includes/modules/pages/checkout_process/header_php.php) called at [/home/goodiesbygail/public_html/NewStorey/index.php:36]
--> PHP Warning: strpos() expects parameter 1 to be string, array given in /home/goodiesbygail/public_html/NewStorey/includes/classes/order.php on line 1068.