diff --git a/Classes/Controller/Backend/Search/IndexQueueModuleController.php b/Classes/Controller/Backend/Search/IndexQueueModuleController.php
index 4bb248d7ae..d8685047fc 100644
--- a/Classes/Controller/Backend/Search/IndexQueueModuleController.php
+++ b/Classes/Controller/Backend/Search/IndexQueueModuleController.php
@@ -336,6 +336,10 @@ protected function addIndexQueueFlashMessage(string $label, int $severity)
      */
     protected function getIndexQueues(): array
     {
+        if ($this->selectedSite === null) {
+            return [];
+        }
+
         $queues = [];
         $configuration = $this->selectedSite->getSolrConfiguration();
         foreach ($configuration->getEnabledIndexQueueConfigurationNames() as $indexingConfiguration) {