156a vanilla install w/demo data
drop tables
import backup from live db
run db cleanup from myPHPadmin.
run zc_install
Upload USPS modules, remove, delete, reinstall and setup
Upload Fedex modules, remove, delete, reinstall and setup
Remove, delete, reinstall A.net SIM
Remove, delete, reinstall A.net AIM
Install, setup Square

Upload zca_bootstrap template
switch to zca_bootstrap template
run zca_bootstrap mySQL

Complete test order using Square as payment form
Order completed as expected.
Found myDEBUG file associated with the checkout

myDEBUG
Code:
[10-Jan-2019 15:07:28 America/Los_Angeles] Request URI: /156/index.php?main_page=checkout_process, IP address: 98.146.xxx.yyy
#1  square->before_process() called at [/home/cPanelID/public_html/156/includes/classes/payment.php:245]
#2  payment->before_process() called at [/home/cPanelID/public_html/156/includes/modules/checkout_process.php:85]
#3  require(/home/cPanelID/public_html/156/includes/modules/checkout_process.php) called at [/home/cPanelID/public_html/156/includes/modules/pages/checkout_process/header_php.php:14]
#4  require(/home/cPanelID/public_html/156/includes/modules/pages/checkout_process/header_php.php) called at [/home/cPanelID/public_html/156/index.php:36]
--> PHP Warning: count(): Parameter must be an array or an object that implements Countable in /home/cPanelID/public_html/156/includes/modules/payment/square.php on line 354.