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(1/1) ContextErrorException

Notice: Trying to access array offset on value of type null

in facebookconversiontrackingplus.php line 2516
at FacebookConversionTrackingPlus->prepareProductDescription(object(Product))in facebookconversiontrackingplus.php line 2454
at FacebookConversionTrackingPlus->getRequiredProductData()in facebookconversiontrackingplus.php line 1929
at FacebookConversionTrackingPlus->hookDisplayHeader(array('cookie' => object(Cookie), 'cart' => object(Cart), 'altern' => 7))in Hook.php line 1007
at HookCore::coreCallHook(object(FacebookConversionTrackingPlus), 'hookDisplayHeader', array('cookie' => object(Cookie), 'cart' => object(Cart), 'altern' => 7))in Hook.php line 431
at HookCore::callHookOn(object(FacebookConversionTrackingPlus), 'displayHeader', array('cookie' => object(Cookie), 'cart' => object(Cart), 'altern' => 7))in Hook.php line 944
at HookCore::exec('displayHeader')in FrontController.php line 598
at FrontControllerCore->initContent()in ProductController.php line 417
at ProductControllerCore->initContent()in Controller.php line 306
at ControllerCore->run()in Dispatcher.php line 518
at DispatcherCore->dispatch()in index.php line 28