From 7eb023dd00ece784835d29c72dddc8404505d675 Mon Sep 17 00:00:00 2001
From: JeroenT <jeroent@2228934.no-reply.drupal.org>
Date: Wed, 21 Apr 2021 09:41:50 +0000
Subject: [PATCH] Update UrlExtractor.php

---
 src/UrlExtractor.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/UrlExtractor.php b/src/UrlExtractor.php
index c6a03a4..6f89617 100644
--- a/src/UrlExtractor.php
+++ b/src/UrlExtractor.php
@@ -51,11 +51,12 @@ class UrlExtractor {
       return $this->getUrlFromEntity($input, $relative);
     }
     elseif ($input instanceof EntityReferenceFieldItemListInterface) {
-      if ($item = $input->first()) {
+      $item = $input->first();
+      if (!empty($item) && $input->entity instanceof ContentEntityInterface) {
         return $this->getUrlFromEntity($item->entity, $relative);
       }
     }
-    elseif ($input instanceof EntityReferenceItem) {
+    elseif ($input instanceof EntityReferenceItem && $input->entity instanceof ContentEntityInterface) {
       return $this->getUrlFromEntity($input->entity, $relative);
     }
     elseif ($input instanceof LinkItemInterface) {