---
title: "Fixing the SimpleSAML \"Check clock synchronization on IdP and SP\" error"
date: "2022-03-19T01:50:25+00:00"
summary:
image:
type: "article"
url: "/acquia-cloud-platform/help/93141-fixing-simplesaml-check-clock-synchronization-idp-and-sp-error"
id: "fc8306c6-89e9-4342-ba95-195216e58959"
---

**Issue**
---------

If you're suddenly unable to log in via your SimpleSAML-based single sign-on, and there's no obvious explanation, and [while troubleshooting](/node/92471) (where you can find SimpleSAML logs), you see this in the logs:

    Jun 24 11:23:46 simplesamlphp ERROR [f1bdf14011] Caused by: SimpleSAML\Error\Exception: Received an rtion that is valid in the future. Check clock synchronization on IdP and SP.

**Resolution**
--------------

Send a support request to your identity provider and ask them to investigate. Their clock may have drifted from the synchronized world clock. If that ds not resolve the iue, [file a ticket with Acquia Support](https://insight.acquia.com/support/tickets/new) and we can investigate on our end (make sure to mention that you've already talked to your identity provider).