Major incident

Crossref: Errors logging in to the test admin tool - test.crossref.org

Affected: Test admin tool

Current status of Crossref: Operational — live Crossref status

Timeline

1. Sep 21, 2026, 02:57 UTC
   investigating
   Members attempting to access the test admin tool - test.crossref.org - are experiencing the following error: 'Error connecting to the authentication service. Please try again later or contact support.' Our technical team is investigating the issue.
2. Sep 21, 2026, 09:18 UTC
   resolved
   This incident has been resolved. Members can now log in to our test admin tool - test.crossref.org - as normal. Between approximately 21:30 UTC on 20 September and 08:30 UTC on 21 September, members attempting to log in saw the error "Error connecting to the authentication service." Our technical team restored the service and confirmed that login is working again.

Updates as published by Crossref (original).