Maybe a channel op can submit a request to renew their server certificate?
11:59 [Esper] -!- Irssi: Looking up irc.esper.net
11:59 [Esper] -!- Irssi: Reconnecting to irc.esper.net [51.255.119.242] port 6697 - use
/RMRECONNS to abort
11:59 [Esper] -!- Irssi: Certificate Chain:
11:59 [Esper] -!- Irssi: Subject: CN: *.esper.net
11:59 [Esper] -!- Irssi: Issuer: C: US, O: Let’s Encrypt, CN: R3
11:59 [Esper] -!- Irssi: Subject: C: US, O: Let’s Encrypt, CN: R3
11:59 [Esper] -!- Irssi: Issuer: C: US, O: Internet Security Research Group, CN:
ISRG Root X1
11:59 [Esper] -!- Irssi: Subject: C: US, O: Internet Security Research Group, CN:
ISRG Root X1
11:59 [Esper] -!- Irssi: Issuer: O: Digital Signature Trust Co., CN: DST Root CA X3
11:59 [Esper] -!- Irssi: Protocol: TLSv1.3 (256 bit, TLS_AES_256_GCM_SHA384)
11:59 [Esper] -!- Irssi: EDH Key: 521 bit ECDH: secp521r1
11:59 [Esper] -!- Irssi: Public Key: 2048 bit RSA, valid from Sep 20 08:34:36 2021 GMT
to Dec 19 08:34:35 2021 GMT
11:59 [Esper] -!- Irssi: Public Key Fingerprint:
82:43:96:95:CC:21:F0:CE:89:0A:C3:EF:15:56:88:96:3F:08:A7:86:E5:F8:19:39:5F:50:8A:16:B3:6
7:93:67 (SHA256)
11:59 [Esper] -!- Irssi: Certificate Fingerprint:
F8:39:AC:B5:DA:8B:B2:B3:F8:FD:5F:8F:B6:CB:6F:23:48:68:A2:C1:5B:58:D6:82:EA:F0:17:18:5A:C
6:BC:4B (SHA256)
11:59 -!- Irssi: warning Could not verify TLS servers certificate: certificate has
expired