diff --git a/src/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php b/src/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php
index cc4208c..a11664f 100644
--- a/src/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php
+++ b/src/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php
@@ -22,7 +22,15 @@ public function __construct($originalService) {
   }
 
   protected function wrapControllerExecutionInRenderContext($controller, array $arguments) {
-    if(get_class($controller[0]) === "Drupal\jsonapi\Controller\EntityResource"){
+    $class = NULL;
+    if (is_array($controller) && !empty($controller[0]) && is_object($controller[0])) {
+      $class = get_class($controller[0]);
+    }
+    elseif (is_object($controller)) {
+      $class = get_class($controller);
+    }
+
+    if ($class === "Drupal\jsonapi\Controller\EntityResource"){
       $context = new RenderContext();
       $response = $this->renderer->executeInRenderContext($context, function () use ($controller, $arguments) {
         return call_user_func_array($controller, $arguments);
diff --git a/src/StrawberryfieldFilePersisterService.php b/src/StrawberryfieldFilePersisterService.php
index 1ac2626..76cc918 100644
--- a/src/StrawberryfieldFilePersisterService.php
+++ b/src/StrawberryfieldFilePersisterService.php
@@ -868,7 +868,7 @@ public function persistFilesInJsonToDisks(StrawberryFieldItemList $field) {
                 $this->messenger()->addError(
                   t(
                     'Your content references a file at @fileurl with Internal ID @file_id that we could not find a full metadata definition for, maybe we forgot to process it?',
-                    ['@fileurl' => $current_uri, '@file_id' => $fid]
+                    ['@fileurl' => $file->getFileUri(), '@file_id' => $fid]
                   )
                 );
               }