diff --git a/CHANGELOG.md b/CHANGELOG.md
index cab0ca0..beecdcb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 All notable changes to this project will be documented in this file.
 
+## [1.48.4] - 2022-02-14
+
+- Fixed: array index issues in php 8+
+
 ## [1.48.3] - 2022-02-10
 
 - Removed: truncate-html and twig extra bundles
diff --git a/src/Item/DefaultItem.php b/src/Item/DefaultItem.php
index 909cbb0..27250e7 100644
--- a/src/Item/DefaultItem.php
+++ b/src/Item/DefaultItem.php
@@ -290,7 +290,7 @@ public function setFormattedValue(string $name, $value, bool $formatted = false)
      */
     public function getFormattedValue(string $name)
     {
-        return $this->_formatted[$name];
+        return $this->_formatted[$name] ?? null;
     }
 
     /**
diff --git a/src/Lists/DefaultList.php b/src/Lists/DefaultList.php
index de0a2df..732f723 100644
--- a/src/Lists/DefaultList.php
+++ b/src/Lists/DefaultList.php
@@ -698,7 +698,7 @@ public function addDataAttributes()
         $listConfig = $this->_manager->getListConfig();
 
         foreach ($GLOBALS['TL_DCA']['tl_list_config']['fields'] as $field => $data) {
-            if ($data['eval']['addAsDataAttribute'] && $listConfig->{$field}) {
+            if (($data['eval']['addAsDataAttribute'] ?? false) && $listConfig->{$field}) {
                 $dataAttributes[] = 'data-'.$stringUtil->camelCaseToDashed($field).'="'.$listConfig->{$field}.'"';
             }
         }
diff --git a/src/Resources/contao/dca/tl_list_config.php b/src/Resources/contao/dca/tl_list_config.php
index 6e11b81..2feb30a 100644
--- a/src/Resources/contao/dca/tl_list_config.php
+++ b/src/Resources/contao/dca/tl_list_config.php
@@ -1,7 +1,7 @@
 <?php
 
 /*
- * Copyright (c) 2021 Heimrich & Hannot GmbH
+ * Copyright (c) 2022 Heimrich & Hannot GmbH
  *
  * @license LGPL-3.0-or-later
  */
@@ -93,7 +93,7 @@
                 'label' => &$GLOBALS['TL_LANG']['tl_list_config']['delete'],
                 'href' => 'act=delete',
                 'icon' => 'delete.gif',
-                'attributes' => 'onclick="if(!confirm(\''.$GLOBALS['TL_LANG']['MSC']['deleteConfirm'].'\'))return false;Backend.getScrollOffset()"',
+                'attributes' => 'onclick="if(!confirm(\''.($GLOBALS['TL_LANG']['MSC']['deleteConfirm'] ?? null).'\'))return false;Backend.getScrollOffset()"',
             ],
             'show' => [
                 'label' => &$GLOBALS['TL_LANG']['tl_list_config']['show'],
diff --git a/src/Resources/contao/dca/tl_list_config_element.php b/src/Resources/contao/dca/tl_list_config_element.php
index 77f44ce..be42e64 100644
--- a/src/Resources/contao/dca/tl_list_config_element.php
+++ b/src/Resources/contao/dca/tl_list_config_element.php
@@ -1,7 +1,7 @@
 <?php
 
 /*
- * Copyright (c) 2021 Heimrich & Hannot GmbH
+ * Copyright (c) 2022 Heimrich & Hannot GmbH
  *
  * @license LGPL-3.0-or-later
  */
@@ -62,7 +62,7 @@
                 'label' => &$GLOBALS['TL_LANG']['tl_list_config_element']['delete'],
                 'href' => 'act=delete',
                 'icon' => 'delete.gif',
-                'attributes' => 'onclick="if(!confirm(\''.$GLOBALS['TL_LANG']['MSC']['deleteConfirm'].'\'))return false;Backend.getScrollOffset()"',
+                'attributes' => 'onclick="if(!confirm(\''.($GLOBALS['TL_LANG']['MSC']['deleteConfirm'] ?? null).'\'))return false;Backend.getScrollOffset()"',
             ],
             'show' => [
                 'label' => &$GLOBALS['TL_LANG']['tl_list_config_element']['show'],