Index: web/typo3/sysext/core/Classes/Utility/ExtensionManagementUtility.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/web/typo3/sysext/core/Classes/Utility/ExtensionManagementUtility.php b/web/typo3/sysext/core/Classes/Utility/ExtensionManagementUtility.php
--- a/web/typo3/sysext/core/Classes/Utility/ExtensionManagementUtility.php	
+++ b/web/typo3/sysext/core/Classes/Utility/ExtensionManagementUtility.php	
@@ -32,6 +32,7 @@
 use TYPO3\CMS\Core\Package\PackageManager;
 use TYPO3\CMS\Core\Preparations\TcaPreparation;
 use TYPO3\CMS\Core\Resource\Filter\FileExtensionFilter;
+use TYPO3\CMS\Core\Service\DependencyOrderingService;
 
 /**
  * Extension Management functions
@@ -117,6 +118,10 @@
      */
     public static function isLoaded($key)
     {
+        if (static::$packageManager === null) {
+            $dependencyOrderingService = GeneralUtility::makeInstance( DependencyOrderingService::class);
+            static::$packageManager = GeneralUtility::makeInstance(PackageManager::class,[$dependencyOrderingService]);
+        }
         return static::$packageManager->isPackageActive($key);
     }