PHP Fatal Error checkout_one_observer

[ianhg]

Zen Car Version 1.5.7d
ZCA Bootstrap 4
One Page Checkout 2.3.10

This error message has appeared recently on several occasions can someone explain what the issue is please.

[07-Jul-2022 10:22:25 UTC] PHP Fatal error: Uncaught Error: Call to a member function add_session() on null in /includes/classes/observers/class.checkout_one_observer.php:167
Stack trace:
#0 /includes/autoload_func.php(44): checkout_one_observer->__construct()
#1 /includes/application_top.php(222): require('/var/www/vhosts...')
#2 /index.php(25): require('/var/www/vhosts...')
#3 {main}
thrown in /includes/classes/observers/class.checkout_one_observer.php on line 167


[07-Jul-2022 10:22:25 UTC] Request URI: /index.php?main_page=account, IP address:
--> PHP Fatal error: Uncaught Error: Call to a member function add_session() on null in /includes/classes/observers/class.checkout_one_observer.php:167
Stack trace:
#0 /includes/autoload_func.php(44): checkout_one_observer->__construct()
#1 /includes/application_top.php(222): require('/var/www/vhosts...')
#2 /index.php(25): require('/var/www/vhosts...')
#3 {main}
thrown in /includes/classes/observers/class.checkout_one_observer.php on line 167.

Thanks

[lat9]

Better to post in the One-Page Checkout support thread (https://www.zen-cart.com/showthread....Support-Thread), but I'll note that you're running a fairly old version of OPC. It's currently at v2.4.1.

[ianhg]

Better to post in the One-Page Checkout support thread (https://www.zen-cart.com/showthread....Support-Thread), but I'll note that you're running a fairly old version of OPC. It's currently at v2.4.1.

Thank you moved to OPC Support thread.