Navigate to https://meta.wikimedia.beta.wmflabs.org/wiki/Main_Page, and you should see a warning about an expired certificate.
According to the certificate, it was valid until September 14, 2020, 07:29:37. Not sure if that is UTC, might be UTC+2.
Description
Description
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Resolved | bd808 | T273956 acme-chief sometimes doesn't refresh certificates because it ignores SIGHUP | |||
| Resolved | Vgutierrez | T293585 [epic] The SSL certificate for Beta cluster domains fails to properly renew & deploy | |||
| Duplicate | None | T262806 Beta cluster certificates have expired (September 2020) |