The SSL issue with the gco.polandball.wiki subdomain was resolved. The problem appeared to be a mismatch between the certificate served at the origin and what Cloudflare expected, causing a 526 error. After verifying the certificates on the ingress and ensuring that traefik was correctly configured, the error disappeared. It seems the issue was likely related to Cloudflare caching or propagation of the correct certificate, though the exact trigger is unclear. All systems are now serving the proper SSL certificate and the wiki is accessible.

It was found that the certificate Cloudflare is serving is from Google Trust Services and is for *.polandball.wiki, with CN=polandball.wiki. It is not loading the correct certificate for gco.polandball.wiki from the MediaWiki secret.

No other wikis are being affected by the problem; we are reviewing values ​​in our Cloudflare parameters.

An error was found in the GCO wiki which was reported by several users; this wiki is currently down.