[BUGFIX] Fix Error for editor users on root page (uid = 0)

Classes/Controller/MailController.php

@@ -227,6 +227,9 @@ class MailController extends ActionController {
 		}
 
 		$this->docHeaderComponent = GeneralUtility::makeInstance(DocHeaderComponent::class);
+		if ($pageInfo === FALSE) {
+			$pageInfo = ['uid' => $pageUid];
+		}
 		$this->docHeaderComponent->setMetaInformation($pageInfo);
 		BackendService::makeButtons($this->docHeaderComponent, $this->request);
 

Classes/Controller/QueueController.php

@@ -149,7 +149,9 @@ class QueueController extends ActionController {
 			$this->view->assign('pages', BackendService::getPages());
 		}
 		$this->docHeaderComponent = GeneralUtility::makeInstance(DocHeaderComponent::class);
-
+		if ($pageInfo === FALSE) {
+			$pageInfo = ['uid' => $pageUid];
+		}
 		$this->docHeaderComponent->setMetaInformation($pageInfo);
 		$this->view->assign('docHeader', $this->docHeaderComponent->docHeaderContent());
 		BackendService::makeButtons($this->docHeaderComponent, $this->request);