diff --git a/service-admin/src/App/src/Form/Fieldset/Date.php b/service-admin/src/App/src/Form/Fieldset/Date.php
index 6547931f7e..493101d4ee 100644
--- a/service-admin/src/App/src/Form/Fieldset/Date.php
+++ b/service-admin/src/App/src/Form/Fieldset/Date.php
@@ -94,7 +94,7 @@ public function getInputFilter(): InputFilter
     /**
      * Combines the errors from each field into one.
      *
-     * @param null $elementName
+     * @param null|string $elementName
      * @return array<string, mixed>
      */
     public function getMessages($elementName = null): array
diff --git a/service-admin/src/App/src/Handler/Initializers/TemplatingSupportTrait.php b/service-admin/src/App/src/Handler/Initializers/TemplatingSupportTrait.php
index a7dffccd3c..8f4574b581 100644
--- a/service-admin/src/App/src/Handler/Initializers/TemplatingSupportTrait.php
+++ b/service-admin/src/App/src/Handler/Initializers/TemplatingSupportTrait.php
@@ -23,9 +23,10 @@ trait TemplatingSupportTrait
     /**
      * @param TemplateRendererInterface $render
      */
-    public function setTemplateRenderer(TemplateRendererInterface $render)
+    public function setTemplateRenderer(TemplateRendererInterface $template)
     {
-        $this->render = $render;
+        $this->render = $template;
+        return $this;
     }
 
     /**
diff --git a/service-admin/src/App/src/Handler/Initializers/UrlHelperTrait.php b/service-admin/src/App/src/Handler/Initializers/UrlHelperTrait.php
index 3157e1e2b5..8419af6c32 100644
--- a/service-admin/src/App/src/Handler/Initializers/UrlHelperTrait.php
+++ b/service-admin/src/App/src/Handler/Initializers/UrlHelperTrait.php
@@ -21,9 +21,10 @@ trait UrlHelperTrait
     /**
      * @param UrlHelper $helper
      */
-    public function setUrlHelper(UrlHelper $helper)
+    public function setUrlHelper(UrlHelper $template)
     {
-        $this->helper = $helper;
+        $this->helper = $template;
+        return $this;
     }
 
     /**
diff --git a/service-admin/src/App/src/Handler/Traits/JwtTrait.php b/service-admin/src/App/src/Handler/Traits/JwtTrait.php
index ef5942cf11..1b2331cf3b 100644
--- a/service-admin/src/App/src/Handler/Traits/JwtTrait.php
+++ b/service-admin/src/App/src/Handler/Traits/JwtTrait.php
@@ -73,7 +73,7 @@ private function clearTokenData(): void
      */
     private function verifyTokenDataExists(): void
     {
-        if (!array_key_exists('jwt-payload', $_SESSION)) {
+        if (!isset($_SESSION['jwt-payload'])) {
             throw new RuntimeException('JWT token not available');
         }
     }
diff --git a/service-admin/src/App/src/Handler/UserFindHandler.php b/service-admin/src/App/src/Handler/UserFindHandler.php
index f1c19740fa..bc2355f6d8 100644
--- a/service-admin/src/App/src/Handler/UserFindHandler.php
+++ b/service-admin/src/App/src/Handler/UserFindHandler.php
@@ -98,10 +98,8 @@ public function handle(ServerRequestInterface $request): ResponseInterface
             }
 
             if ($numResults === 0) {
+                /** @var array */
                 $formMessages = $form->getMessages();
-                if (!is_array($formMessages)) {
-                    $formMessages = iterator_to_array($formMessages);
-                }
 
                 // Set error message
                 $messages = array_merge($formMessages, [
diff --git a/service-admin/src/App/src/Handler/UserSearchHandler.php b/service-admin/src/App/src/Handler/UserSearchHandler.php
index b6b82c75b0..b00e208c83 100644
--- a/service-admin/src/App/src/Handler/UserSearchHandler.php
+++ b/service-admin/src/App/src/Handler/UserSearchHandler.php
@@ -53,11 +53,8 @@ public function handle(ServerRequestInterface $request): ResponseInterface
             $result = $this->userService->search($email);
 
             if ($result === false) {
-                // Traversable|array
+                /** @var array */
                 $formMessages = $form->getMessages();
-                if (!is_array($formMessages)) {
-                    $formMessages = iterator_to_array($formMessages);
-                }
 
                 // Set error message
                 $messages = array_merge($formMessages, [