OPNsense 25.7.10 – Crash Due to Captive Portal PHP Errors

[saleh]

Hello OPNsense Team,

Every day, we are receiving crash reports due to PHP errors in the Captive Portal. Please find the logs and attached files below, and let us know if you can help us resolve this issue.

 PHP Errors:

[21-Dec-2025 23:39:26 Asia/Jerusalem] TypeError: Cannot assign null to property OPNsense\CaptivePortal\Api\AccessController::$arp of type array in /usr/local/opnsense/mvc/app/controllers/OPNsense/CaptivePortal/Api/AccessController.php:105
Stack trace:
#0 /usr/local/opnsense/mvc/app/controllers/OPNsense/CaptivePortal/Api/AccessController.php(254): OPNsense\CaptivePortal\Api\AccessController->getClientMac('10.5.90.224')
#1 /usr/local/opnsense/mvc/app/library/OPNsense/Mvc/Dispatcher.php(166): OPNsense\CaptivePortal\Api\AccessController->logonAction()
#2 /usr/local/opnsense/mvc/app/library/OPNsense/Mvc/Router.php(156): OPNsense\Mvc\Dispatcher->dispatch(Object(OPNsense\Mvc\Request), Object(OPNsense\Mvc\Response), Object(OPNsense\Mvc\Session))
#3 /usr/local/opnsense/mvc/app/library/OPNsense/Mvc/Router.php(139): OPNsense\Mvc\Router->performRequest(Object(OPNsense\Mvc\Dispatcher))
#4 /usr/local/opnsense/www/api.php(36): OPNsense\Mvc\Router->routeRequest('/api/captivepor...', Array)
#5 {main}

Thank you and Best Regards,
Saleh