From 18b5f4e515c5e66a21e54cb6ec8438d4d1392f95 Mon Sep 17 00:00:00 2001
From: ghermens <47635467+ghermens@users.noreply.github.com>
Date: Wed, 17 Jun 2026 16:58:58 +0200
Subject: [PATCH] [BUGFIX] Avoid undefined array key PHP warning

---
 .../ManipulateBackendLayoutColPosConfigurationForPage.php     | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Classes/Listener/ManipulateBackendLayoutColPosConfigurationForPage.php b/Classes/Listener/ManipulateBackendLayoutColPosConfigurationForPage.php
index df6ddb51..5a2b4e2e 100644
--- a/Classes/Listener/ManipulateBackendLayoutColPosConfigurationForPage.php
+++ b/Classes/Listener/ManipulateBackendLayoutColPosConfigurationForPage.php
@@ -43,8 +43,8 @@ public function __invoke(ManipulateBackendLayoutColPosConfigurationForPageEvent
         $cType = $container->getCType();
         $configuration = $this->tcaRegistry->getContentDefenderConfiguration($cType, $e->colPos);
         $e->configuration = [
-            'allowedContentTypes' => $configuration['allowedContentTypes'],
-            'disallowedContentTypes' => $configuration['disallowedContentTypes'],
+            'allowedContentTypes' => $configuration['allowedContentTypes'] ?? '',
+            'disallowedContentTypes' => $configuration['disallowedContentTypes'] ?? '',
         ];
     }