diff --git a/core/lib/Drupal/Core/Entity/Entity.php b/core/lib/Drupal/Core/Entity/Entity.php
index 95e85e2..11c3ad1 100644
--- a/core/lib/Drupal/Core/Entity/Entity.php
+++ b/core/lib/Drupal/Core/Entity/Entity.php
@@ -176,6 +176,12 @@ public function urlInfo($rel = 'canonical', array $options = []) {
    * {@inheritdoc}
    */
   public function toUrl($rel = 'canonical', array $options = []) {
+    // If attempting to preview a new and unsaved entity, it will not have an ID.
+    // In order for the preview to display properly, create a link to the front page.
+    if ($this->isNew() && property_exists($this, 'in_preview') && $this->in_preview === TRUE) {
+      return Url::fromRoute('<front>');
+    }
+
     if ($this->id() === NULL) {
       throw new EntityMalformedException(sprintf('The "%s" entity cannot have a URI as it does not have an ID', $this->getEntityTypeId()));
     }