Mateu Aguiló Bosch · e0606b9d
--- a/src/Form/JsonapiResourceConfigForm.php
+++ b/src/Form/JsonapiResourceConfigForm.php
@@ -306,7 +306,7 @@ class JsonapiResourceConfigForm extends EntityForm {
      '#open' => TRUE,
    ];

-    $markup .= '';
+    $markup = '';
    $markup .= '<dl>';
    $markup .= '<dt>' . t('Disabled') . '</dt>';
    $markup .= '<dd>' . t('Check this if you want to disable this field completely. Disabling required fields will cause problems when writing to the resource.') . '</dd>';