Fixed PHPunit errors.

src/Form/AdminPages/BaseEntityAdminForm.php

@@ -170,7 +170,7 @@ class BaseEntityAdminForm extends AbstractType
             'empty_data' => null,
         ]);
 
-        if ($entity instanceof StructuralEntityType) {
+        if ($entity instanceof AbstractStructuralDBElement) {
             $builder->add(
                 'parameters',
                 CollectionType::class,

src/Helpers/LabelResponse.php

@@ -54,6 +54,8 @@ class LabelResponse extends Response
         }
 
         $this->ensureIEOverSSLCompatibility($request);
+
+        return $this;
     }
 
     /**