Due to fallout from Lets Encrypt's root certificate expiry (techcrunch.com/2021/09/21/lets), some users may have had issues whilst trying to connect to us today. We think we've fixed the bulk of the problem now, but feel free to email us at support@libera.chat if you still have issues.


technical details: Lets Encrypt attempted to mitigate their new root cert not being trusted on old devices by cross-signing it with their old root cert (details here letsencrypt.org/docs/dst-root-) but this broke old openssl, so we've ditched this mitigation ~jess (via kline)

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