--- GroupUserUpdateProcessor.php.orig	2022-05-09 15:30:34.779363077 -0400
+++ GroupUserUpdateProcessor.php	2022-05-09 15:30:56.763617847 -0400
@@ -286,6 +286,13 @@
           'ldap_user'
         );
         $uid = $this->externalAuth->getUid($username, 'ldap_user');
+        if (!$uid) {
+          $this->logger->error(
+            'Periodic update: Error creating user @name',
+            ['@name' => $username]
+          );
+          return;
+        }
       }
       else {
         $this->logger->error(