diff --git a/Controller/ApiController.php b/Controller/ApiController.php
index 960f578..67e6722 100755
--- a/Controller/ApiController.php
+++ b/Controller/ApiController.php
@@ -107,9 +107,11 @@ final class ApiController extends Controller
             $accounts[] = $card->createdBy->id;
         }
 
-        foreach ($card->commentList->comments as $element) {
-            if ($element->createdBy->id !== $comment->createdBy->id) {
-                $accounts[] = $element->createdBy->id;
+        if ($card->commentList !== null) {
+            foreach ($card->commentList->comments as $element) {
+                if ($element->createdBy->id !== $comment->createdBy->id) {
+                    $accounts[] = $element->createdBy->id;
+                }
             }
         }
 
@@ -456,7 +458,14 @@ final class ApiController extends Controller
     public function apiCommentCreate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
         $this->app->moduleManager->get('Comment', 'Api')->apiCommentCreate($request, $response, $data);
-        $comment = $response->getDataArray($request->uri->__toString())['response'];
+        $comment = $response->getDataArray($request->uri->__toString())['response'] ?? null;
+
+        if ($comment === null) {
+            $response->header->status = RequestStatusCode::R_400;
+            $this->createInvalidCreateResponse($request, $response, $comment);
+
+            return;
+        }
 
         $this->createCommentNotifications($comment, $request);
     }
diff --git a/Docs/Dev/en/structure.md b/Docs/Dev/en/structure.md
deleted file mode 100755
index 170446d..0000000
--- a/Docs/Dev/en/structure.md
+++ /dev/null
@@ -1,5 +0,0 @@
-# Structure
-
-## ER
-
-![ER](Modules/Kanban/Docs/Dev/img/er.png)
\ No newline at end of file
diff --git a/Docs/Dev/img/er.png b/Docs/Dev/img/er.png
deleted file mode 100644
index 1671f01..0000000
Binary files a/Docs/Dev/img/er.png and /dev/null differ
diff --git a/Docs/introduction.md b/Docs/introduction.md
index 9933308..857550a 100755
--- a/Docs/introduction.md
+++ b/Docs/introduction.md
@@ -4,11 +4,11 @@ The **Kanban** module allows users to create kanban boards to manage projects, e
 
 ## Target Group
 
-The target groups for this module is everyone who would like to manage projects and events in a kanban style. 
+The target groups for this module is everyone who would like to manage projects and events in a kanban style.
 
 # Setup
 
-The module can be installed through the integrated module downloader and installer or by uploading the module into the `Modules/` directory and executing the installation through the module installer. 
+The module can be installed through the integrated module downloader and installer or by uploading the module into the `Modules/` directory and executing the installation through the module installer.
 
 The module is depending on the **Editor** module which provides most of the writing features and the **Tasks** module for generating the tasks.
 
@@ -19,7 +19,3 @@ Other modules that work great with this one together are:
 * [Tasks](Tasks)
 * [ProjectManagement](ProjectManagement)
 * [EventManagement](EventManagement)
-
-# Dependencies
-
-* [Editor](Editor)
diff --git a/Theme/Backend/Lang/de.lang.php b/Theme/Backend/Lang/de.lang.php
index 1f7598c..a321f36 100755
--- a/Theme/Backend/Lang/de.lang.php
+++ b/Theme/Backend/Lang/de.lang.php
@@ -20,8 +20,8 @@ return ['Kanban' => [
     'Back'        => 'Zurück',
     'Date'        => 'Datum',
     'Description' => 'Beschreibung',
-    'Columns'       => 'Spalten',
-    'Column'       => 'Spalte',
+    'Columns'     => 'Spalten',
+    'Column'      => 'Spalte',
     'Order'       => 'Order',
     'Board'       => 'Board',
     'Name'        => 'Name',
diff --git a/Theme/Backend/Lang/en.lang.php b/Theme/Backend/Lang/en.lang.php
index e458af8..a61a742 100755
--- a/Theme/Backend/Lang/en.lang.php
+++ b/Theme/Backend/Lang/en.lang.php
@@ -21,8 +21,8 @@ return ['Kanban' => [
     'Date'        => 'Date',
     'Description' => 'Description',
     'Order'       => 'Order',
-    'Columns'       => 'Columns',
-    'Column'       => 'Column',
+    'Columns'     => 'Columns',
+    'Column'      => 'Column',
     'Board'       => 'Board',
     'Name'        => 'Name',
     'Status'      => 'Status',
diff --git a/Theme/Backend/kanban-card.tpl.php b/Theme/Backend/kanban-card.tpl.php
index 79d0838..3c96f9e 100755
--- a/Theme/Backend/kanban-card.tpl.php
+++ b/Theme/Backend/kanban-card.tpl.php
@@ -16,7 +16,7 @@ use Modules\Comments\Models\CommentListStatus;
 use phpOMS\Uri\UriFactory;
 
 /** @var \Modules\Kanban\Models\KanbanCard $card */
-$card = $this->data['card'];
+$card  = $this->data['card'];
 $isNew = $card->id === 0;
 
 $editPossible = $card->createdBy->id === $this->request->header->account;
diff --git a/info.json b/info.json
index e6c52da..1f36b13 100755
--- a/info.json
+++ b/info.json
@@ -12,7 +12,7 @@
     },
     "creator": {
         "name": "Jingga",
-        "website": "jingga.app"
+        "website": "https://jingga.app"
     },
     "description": "Kanban module.",
     "directory": "Kanban",