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Outage in Cornerstone

Service Disruption: US SL4 – Login & 404 Error Issues

Resolved Minor
May 21, 2026 - Started 4 days ago - Lasted about 2 hours
Official incident page

Incident Report

Summary AI Generated

Cornerstone's US SL4 region experienced a service disruption from 8:39 AM to 9:22 AM Pacific Time, causing users to encounter login failures and 404 errors when accessing the application. The performance degradation affected clients in this region with slow performance and intermittent errors during the outage period. The issue was identified, fixed, and resolved after monitoring confirmed no further recurrence.

US SL4 is currently experiencing a service disruption. Some users are unable to log in or are encountering 404 errors when accessing the application. This issue is our highest priority, and our team is actively working to resolve it as quickly as possible. We will provide further updates as soon they become available. Please check back periodically for the latest information.

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Latest Updates ( sorted recent to last )
RESOLVED 4 days ago - at 05/21/2026 06:07PM

After a period of monitoring with no further recurrence observed, the issue is now considered resolved.

The CSOD Technology Team identified a performance degradation impacting US SL4 customers. The issue began at 8:39 AM Pacific Time and was resolved at 9:22 AM Pacific Time. During this period, clients with portals in this region may have experienced slow performance or intermittent errors while accessing/working on the application.

MONITORING 4 days ago - at 05/21/2026 04:42PM

A fix has been implemented and we are monitoring the results.

IDENTIFIED 4 days ago - at 05/21/2026 04:30PM

The issue has been identified and a fix is being implemented.

INVESTIGATING 4 days ago - at 05/21/2026 04:05PM

US SL4 is currently experiencing a service disruption. Some users are unable to log in or are encountering 404 errors when accessing the application. This issue is our highest priority, and our team is actively working to resolve it as quickly as possible. We will provide further updates as soon they become available. Please check back periodically for the latest information.

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