[BUGFIX] Fixed Type Error when cObj returns null

- Implemented `getContentObjectRenderer()` method to handle cases where `cObj` might be null in some cases where request is not build completely
- Adjusted `applyStdWrapProperties()` to ensure graceful fallback when `cObj` is not available.

This improves error handling and diagnostics, making the extension more reliable and easier to maintain.

Resolves: #37

Author: hojalatheef

Classes/Helper/TypoScriptHelper.php

@@ -102,6 +102,11 @@ public function hasReplaceEntry(array $typoScriptConfiguration, $key): bool
 
     public function applyStdWrapProperties(string $content, array $stdWrapConfiguration): string
     {
-        return $this->getContentObjectRenderer()->stdWrap($content, $stdWrapConfiguration);
+        $contentObjectRenderer = $this->getContentObjectRenderer();
+        if ($contentObjectRenderer === null) {
+            return $content;
+        }
+
+        return $contentObjectRenderer->stdWrap($content, $stdWrapConfiguration);
     }
 }

Classes/Traits/GetTypoScriptFrontendControllerTrait.php

@@ -29,8 +29,14 @@ protected function getTypoScriptFrontendController(): TypoScriptFrontendControll
         return $GLOBALS['TSFE'];
     }
 
-    protected function getContentObjectRenderer(): ContentObjectRenderer
+    protected function getContentObjectRenderer(): ?ContentObjectRenderer
     {
-        return $this->getTypoScriptFrontendController()->cObj;
+        $tsfe = $this->getTypoScriptFrontendController();
+
+        if (!$tsfe->cObj) {
+            return null;
+        }
+
+        return $tsfe->cObj;
     }
 }