diff --git a/Controller/ApiController.php b/Controller/ApiController.php
index a52d3d6..71c10d0 100644
--- a/Controller/ApiController.php
+++ b/Controller/ApiController.php
@@ -240,7 +240,7 @@ final class ApiController extends Controller
             ->with('tasks/files')
             ->with('tasks/tags')
             ->with('tasks/attributes')
-            ->where('id', (int) $request->getData('id'))
+            ->where('id', $request->getDataInt('id') ?? 0)
             ->execute();
 
         $checklist           = new Checklist();
diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index f7bc376..5b4555a 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -83,7 +83,7 @@ final class BackendController extends Controller
             ->with('tasks/taskElements/accRelation/relation')
             ->with('tasks/taskElements/grpRelation')
             ->with('tasks/taskElements/grpRelation/relation')
-            ->where('id', (int) $request->getData('id'))
+            ->where('id', $request->getDataInt('id') ?? 0)
             ->sort('tasks/due', OrderType::ASC)
             ->execute();
 
@@ -161,7 +161,7 @@ final class BackendController extends Controller
             ->with('tasks/taskElements/accRelation/relation')
             ->with('tasks/taskElements/grpRelation')
             ->with('tasks/taskElements/grpRelation/relation')
-            ->where('id', (int) $request->getData('id'))
+            ->where('id', $request->getDataInt('id') ?? 0)
             ->sort('tasks/due', OrderType::ASC)
             ->execute();
 
diff --git a/Theme/Backend/checklist-task.tpl.php b/Theme/Backend/checklist-task.tpl.php
index 22dd650..85f67ad 100644
--- a/Theme/Backend/checklist-task.tpl.php
+++ b/Theme/Backend/checklist-task.tpl.php
@@ -26,12 +26,12 @@ echo $this->data['nav']->render(); ?>
                 <div class="portlet-body">
                     <div class="form-group">
                         <label for="iiReceiver"><?= $this->getHtml('To'); ?></label>
-                        <?= $this->getData('accGrpSelector')->render('iReceiver', 'forward', true); ?>
+                        <?= $this->data['accGrpSelector']->render('iReceiver', 'forward', true); ?>
                     </div>
 
                     <div class="form-group">
                         <label for="iObserver"><?= $this->getHtml('CC'); ?></label>
-                        <?= $this->getData('accGrpSelector')->render('iCC', 'cc', false); ?>
+                        <?= $this->data['accGrpSelector']->render('iCC', 'cc', false); ?>
                     </div>
 
                     <div class="form-group">
@@ -61,7 +61,7 @@ echo $this->data['nav']->render(); ?>
                     </div>
 
                     <div class="form-group">
-                        <?= $this->data['editor']->getData('text')?->render('task-editor', 'plain', 'fTask'); ?>
+                        <?= $this->data['editor']->data['text']?->render('task-editor', 'plain', 'fTask'); ?>
                     </div>
                 </div>
                 <div class="portlet-foot">
@@ -95,4 +95,4 @@ echo $this->data['nav']->render(); ?>
     </div>
 </div>
 
-<?= $this->getData('accGrpSelector')->getData('popup')?->render(); ?>
\ No newline at end of file
+<?= $this->data['accGrpSelector']->data['popup']?->render(); ?>
\ No newline at end of file