From fce1a027d7617e56cba7257c683f634610b2ce78 Mon Sep 17 00:00:00 2001
From: Patrick Lenk <Patta@users.noreply.github.com>
Date: Fri, 18 Oct 2024 09:56:47 +0200
Subject: [PATCH] [BUGFIX] Check if the site is not a NullSite before calling
 getAllLanguages() in SelectCategories.php

resolves #523
---
 Classes/SelectCategories.php | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/Classes/SelectCategories.php b/Classes/SelectCategories.php
index c24af3f3c..186b6aafd 100644
--- a/Classes/SelectCategories.php
+++ b/Classes/SelectCategories.php
@@ -17,6 +17,7 @@
 
 use DirectMailTeam\DirectMail\Repository\TempRepository;
 use TYPO3\CMS\Core\Localization\LanguageService;
+use TYPO3\CMS\Core\Site\Entity\NullSite;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 
 /**
@@ -39,11 +40,17 @@ public function getLocalizedCategories(array &$params): void
         $lang = $this->getLang();
 
         $site = $params['site'];
-        $languages = $site->getAllLanguages();
-        foreach($languages as $language) {
-            if($language->getLocale()->getLanguageCode() == $lang) {
-                $sysLanguageUid = $language->getLanguageId();
+
+        // Check if the site is not a NullSite before calling getAllLanguages()
+        if (!$site instanceof NullSite) {
+            $languages = $site->getAllLanguages();
+            foreach ($languages as $language) {
+                if ($language->getLocale()->getLanguageCode() == $lang) {
+                    $sysLanguageUid = $language->getLanguageId();
+                }
             }
+        } else {
+            $sysLanguageUid = 0;
         }
 
         if (is_array($params['items']) && !empty($params['items'])) {