It seems to have a problem with login, but I changed nothing about that, I just upgraded Miranda via updater plugin.
I have a copy of the original version of Miranda, which doesn't help either, I tried to do the upgrade again, with no success.
The old Miranda doesn't log in either (which was the reason I upgraded it, although few days ago it worked), but the old one doesn't show any error message, it just stays offline.
Here is the log of upgraded Miranda:
[2022-09-19 18:24:09 CF74] [ICQ_1] CIcqProto::SetStatus iNewStatus = 40072, m_iStatus = 40071, m_iDesiredStatus = 40071 m_hWorkerThread = 00000678
[2022-09-19 18:24:09 CC70] [ICQ_1] Executing request 9c80890c-1500-424d-b380-f1eccee64d5f:
https://api.login.icq.net/auth/clientLogin[2022-09-19 18:24:09 CC70] [ICQ_1] Connection request to api.login.icq.net:443 (Flags 11)....
[2022-09-19 18:24:09 CC70] [ICQ_1] (07298490) Connecting to server api.login.icq.net:443....
[2022-09-19 18:24:09 CC70] [ICQ_1] (07298490) Connecting to ip 178.237.20.78:443 ....
[2022-09-19 18:24:09 CC70] [ICQ_1] (2152) Connected to api.login.icq.net:443
[2022-09-19 18:24:09 CC70] [ICQ_1] (2152 api.login.icq.net) Starting SSL/TLS negotiation
[2022-09-19 18:24:09 CC70] [ICQ_1] (2152 api.login.icq.net) SSL/TLS negotiation successful
[2022-09-19 18:24:10 CC70] [ICQ_1] (07298490:2152) Data received
HTTP/1.1 200 OK
Server: openresty
Date: Mon, 19 Sep 2022 16:24:10 GMT
Content-Type: application/json;charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
Keep-Alive: timeout=75
Vary: Accept-Encoding
Pragma: no-cache
Cache-Control: no-store,no-cache,must-revalidate
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
Content-Encoding: gzip
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{"response":{"statusCode":330, "statusText":"Password/LoginId Required/Invalid", "statusDetailCode":3011, "data":{"challenge":{"context":"VtmMeQAAAFkAAh50", "info":"Enter your password again"}}}}
[2022-09-19 18:24:10 CC70] [ICQ_1] ConnectionFailed -> reason 1
[2022-09-19 18:24:10 CC70] [ICQ_1] CIcqProto::ShutdownSession
[2022-09-19 18:24:10 CC70] [ICQ_1] CIcqProto::OnLoggedOut