Index: Classes/TypoScript/IncludeTree/SysTemplateRepository.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/Classes/TypoScript/IncludeTree/SysTemplateRepository.php b/Classes/TypoScript/IncludeTree/SysTemplateRepository.php
--- a/Classes/TypoScript/IncludeTree/SysTemplateRepository.php	
+++ b/Classes/TypoScript/IncludeTree/SysTemplateRepository.php	(date 1730794802911)
@@ -61,6 +61,9 @@
      */
     public function getSysTemplateRowsByRootline(array $rootline, ?ServerRequestInterface $request = null): array
     {
+        if ($rootline === []) {
+            return [];
+        }
         // Site-root node first!
         $rootLinePageIds = array_reverse(array_column($rootline, 'uid'));
         $sysTemplateRows = [];