One-Page Checkout [Support Thread]

[njcyx]

Thanks for your efforts. It may not worth spending more time on a "retired" payment module at this time, at least opc 2.5.5 works really good on my end. I will probably keep using opc 2.5.5 with paypal express, until we decide to upgrade the payment to paypalr.

I'm not sure maybe I'm the only one who use OPC with paypal express now...

[njcyx]

I checked the log files for yesterday's issue again and it seems to be that not exactly the same as last time.

[18-Jun-2026 12:49:09 America/New_York] PHP Fatal error:  Uncaught Error: Typed property OnePageCheckout::$isVirtualOrder must not be accessed before initialization in public_html/includes/classes/OnePageCheckout.php:2572
Stack trace:
#0 /public_html/includes/classes/observers/class.checkout_one_observer.php(687): OnePageCheckout->getTaxLocations()
#1 /public_html/includes/classes/traits/NotifierManager.php(106): checkout_one_observer->update(Object(notifier), 'ZEN_GET_TAX_LOC...', Array, false, NULL, NULL, NULL, NULL, NULL, NULL, NULL)
#2 //public_html/includes/functions/functions_taxes.php(354): base->notify('ZEN_GET_TAX_LOC...', Array, false)
#3 /public_html/includes/modules/order_total/ot_tax.php(66): zen_get_tax_locations()
#4 /public_html/includes/classes/order_total.php(96): ot_tax->process()
#5 /public_html/includes/modules/checkout_process.php(104): order_total->process()
#6 /public_html/includes/modules/pages/checkout_process/header_php.php(13): require('')
#7 /public_html/index.php(35): require('')
#8 {main}
  thrown in /public_html/includes/classes/OnePageCheckout.php on line 2572

[18-Jun-2026 12:49:09 America/New_York] Request URI: /index.php?main_page=checkout_process, IP address: xxxx
--> PHP Fatal error: Uncaught Error: Typed property OnePageCheckout::$isVirtualOrder must not be accessed before initialization in /public_html/includes/classes/OnePageCheckout.php:2572
Stack trace:
#0 /public_html/includes/classes/observers/class.checkout_one_observer.php(687): OnePageCheckout->getTaxLocations()
#1 /public_html/includes/classes/traits/NotifierManager.php(106): checkout_one_observer->update(Object(notifier), 'ZEN_GET_TAX_LOC...', Array, false, NULL, NULL, NULL, NULL, NULL, NULL, NULL)
#2 /public_html/includes/functions/functions_taxes.php(354): base->notify('ZEN_GET_TAX_LOC...', Array, false)
#3 /public_html/includes/modules/order_total/ot_tax.php(66): zen_get_tax_locations()
#4 /public_html/includes/classes/order_total.php(96): ot_tax->process()
#5 /public_html/includes/modules/checkout_process.php(104): order_total->process()
#6 /public_html/includes/modules/pages/checkout_process/header_php.php(13): require('')
#7 /public_html/index.php(35): require('')
#8 {main}
  thrown in /public_html/includes/classes/OnePageCheckout.php on line 2572.

[18-Jun-2026 12:49:09 America/New_York] Request URI: /index.php?main_page=checkout_process, IP address: xxxx
--> PHP Fatal error: Uncaught Error: Typed property OnePageCheckout::$isVirtualOrder must not be accessed before initialization in /public_html/includes/classes/OnePageCheckout.php:2572
Stack trace:
#0 /public_html/includes/classes/observers/class.checkout_one_observer.php(687): OnePageCheckout->getTaxLocations()
#1 /public_html/includes/classes/traits/NotifierManager.php(106): checkout_one_observer->update(Object(notifier), 'ZEN_GET_TAX_LOC...', Array, false, NULL, NULL, NULL, NULL, NULL, NULL, NULL)
#2 /public_html/includes/functions/functions_taxes.php(354): base->notify('ZEN_GET_TAX_LOC...', Array, false)
#3 public_html/includes/modules/order_total/ot_tax.php(66): zen_get_tax_locations()
#4 /public_html/includes/classes/order_total.php(96): ot_tax->process()
#5 /public_html/includes/modules/checkout_process.php(104): order_total->process()
#6 /public_html/includes/modules/pages/checkout_process/header_php.php(13): require('')
#7 /public_html/index.php(35): require('')
#8 {main}
  thrown in public_html/includes/classes/OnePageCheckout.php on line 2572. 

OnePageCheckout.php on line 2572 is the following

if ($this->isVirtualOrder === true || $this->getShippingBilling() === true) {