[BUGFIX] Fix the language record fetching

Classes/Service/BackendService.php

@@ -218,7 +218,7 @@ class BackendService {
 	public static function getLanguages(): array {
 		$queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)->getQueryBuilderForTable('sys_language');
 		$rows = $queryBuilder->select('*')
-			->from('sys_language');
+			->from('sys_language')->execute()->fetchAll();
 
 		$languages = [];