diff --git a/classes/controller.php b/classes/controller.php
index e89f517b..40c6cdfd 100644
--- a/classes/controller.php
+++ b/classes/controller.php
@@ -107,7 +107,23 @@ class AdminController
                 } else {
                     $nonce = $this->grav['uri']->param('admin-nonce');
                 }
-                if (!$nonce || !Utils::verifyNonce($nonce, 'admin-form')) {
+
+                if (!$nonce || !Utils::verifyNonce($nonce, 'admin-form'))
+                {
+                    if ($this->task == 'addmedia') {
+
+                        $message = sprintf($this->admin->translate('PLUGIN_ADMIN.FILE_TOO_LARGE', null, true), ini_get('post_max_size'));
+
+                        //In this case it's more likely that the image is too big than POST can handle. Show message
+                        $this->admin->setMessage($message, 'error');
+                        $this->admin->json_response = [
+                            'status'  => 'error',
+                            'message' => $message
+                        ];
+
+                        return false;
+                    }
+
                     $this->admin->setMessage($this->admin->translate('PLUGIN_ADMIN.INVALID_SECURITY_TOKEN'), 'error');
                     $this->admin->json_response = [
                         'status'  => 'error',
diff --git a/languages/en.yaml b/languages/en.yaml
index b9b37c0d..6d7c58ec 100644
--- a/languages/en.yaml
+++ b/languages/en.yaml
@@ -483,4 +483,5 @@ PLUGIN_ADMIN:
   FILE_ERROR_ADD: "An error occurred while trying to add the file"
   FILE_ERROR_UPLOAD: "An error occurred while trying to upload the file"
   FILE_UNSUPPORTED: "Unsupported file type"
-  ADD_ITEM: "Add item"
\ No newline at end of file
+  ADD_ITEM: "Add item"
+  FILE_TOO_LARGE: "The file is too large to be uploaded, maximum allowed is %s according <br>to your PHP settings. Increase your `post_max_size` PHP setting"
\ No newline at end of file