diff --git a/CHANGELOG.md b/CHANGELOG.md
index fcbb299d..bff373ad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 All notable changes to this project will be documented in this file.
 
+## [3.10.1] - 2026-02-10
+- Fixed: exception in FormatterUtil when value is null
+
 ## [3.10.0] - 2026-01-22
 - Added: Option to adjust the field where the alias is generated from (instead of overriding the complete method) ([#106](https://github.com/heimrichhannot/contao-utils-bundle/pull/106))
 - Added: AliasFieldConfiguration::setGenerateAliasCallback() ([#106](https://github.com/heimrichhannot/contao-utils-bundle/pull/106))
diff --git a/src/EntityFinder/Element.php b/src/EntityFinder/Element.php
index 6fef5e84..939075b3 100644
--- a/src/EntityFinder/Element.php
+++ b/src/EntityFinder/Element.php
@@ -12,7 +12,7 @@ public function __construct(
         public readonly int     $id,
         public readonly string  $table,
         public readonly ?string $description = null,
-        public readonly ?iterable $parents = null
+        public readonly iterable|null $parents = null
     )
     {
     }
diff --git a/src/Util/FormatterUtil.php b/src/Util/FormatterUtil.php
index 3412a294..912e1a08 100644
--- a/src/Util/FormatterUtil.php
+++ b/src/Util/FormatterUtil.php
@@ -168,9 +168,12 @@ public function formatDcaFieldValue(
                 : $reference;
         }
 
-        if ($settings->replaceInsertTags)
-        {
-            $value = $this->insertTagParser->replace($value);
+        if (is_int($value) || null === $value) {
+            return $value;
+        }
+
+        if ($settings->replaceInsertTags) {
+            $value = $this->insertTagParser->replace((string)$value);
         }
 
         return Str::specialchars($value);
diff --git a/tests/Util/FormatterUtilTest.php b/tests/Util/FormatterUtilTest.php
index 9f58883b..33178022 100644
--- a/tests/Util/FormatterUtilTest.php
+++ b/tests/Util/FormatterUtilTest.php
@@ -70,5 +70,16 @@ public function testFormatDcaFieldValue()
                     ->setDcaOverride(['inputType' => 'text'])
             )
         );
+
+        $this->assertEquals(
+            '',
+            $formatterUtil->formatDcaFieldValue(
+                $dataContainer,
+                'message',
+                null,
+                FormatterUtil\FormatDcaFieldValueOptions::create()
+                    ->setDcaOverride(['inputType' => 'textarea'])
+            )
+        );
     }
 }
\ No newline at end of file