Zen 1.5.6C | PHP 7.3.9 | OPC 2.1.4

Numinix's 3.3.0 version doesn't work. It installs and can never be edited in the admin. Additionally it does not show in checkout at all

(https://www.zen-cart.com/downloads.php?do=file&id=232) 3.2.3 shows in checkout and works fine in admin, but the amount is never applied in checkout even though it's clearly registering an action when "apply" is clicked for insurance. Below are the logs

[24-Sep-2019 11:23:31 America/New_York] PHP Notice: Undefined property: ot_insurance::$include_shipping in /home/XXXX/public_html/XXXX/includes/modules/order_total/ot_insurance.php on line 196
[24-Sep-2019 11:23:31 America/New_York] PHP Notice: Undefined property: ot_insurance::$include_tax in /home/XXXX/public_html/XXXX/includes/modules/order_total/ot_insurance.php on line 197
[24-Sep-2019 11:23:31 America/New_York] PHP Notice: Undefined index: opt_insurance in /home/XXXX/public_html/XXXX/includes/modules/order_total/ot_insurance.php on line 244
[24-Sep-2019 11:23:31 America/New_York] PHP Notice: Undefined property: ot_insurance::$include_shipping in /home/XXXX/public_html/XXXX/includes/modules/order_total/ot_insurance.php on line 196
[24-Sep-2019 11:23:31 America/New_York] PHP Notice: Undefined property: ot_insurance::$include_tax in /home/XXXX/public_html/XXXX/includes/modules/order_total/ot_insurance.php on line 197
[24-Sep-2019 11:23:31 America/New_York] PHP Notice: Undefined index: opt_insurance in /home/XXXX/public_html/XXXX/includes/modules/order_total/ot_insurance.php on line 116