spineを起動したところ、以下のようなエラーが出て、起動できなくなりました。
昨日までは正常に起動していたのですが、今日になったら起動できなくなり、
再インストールやファイアウォールオフにしても同じエラーが出てしまいます。

Authentication failed

Sorry, Spine was unable to authenticate your activation code:
The connection to the server was lost.
Please check your internet connection and any firewall settings that may be
blocking Spine.

以下はこの時のログです。

Spine Launcher 4.2.18
Esoteric Software LLC (C) 2013-2024 | http://esotericsoftware.com
Windows 10 Home amd64 10.0
WARNING: Unable to ping server: jp.esotericsoftware.com
[net.Socket] Connection reset by peer
at sun.nio.ch.NioSocketImpl.implWrite(Unknown Source)
at sun.nio.ch.NioSocketImpl.write(Unknown Source)
at sun.nio.ch.NioSocketImpl$2.write(Unknown Source)
at java.net.Socket$SocketOutputStream.write(Unknown Source)
at sun.security.ssl.SSLSocketOutputRecord.flush(Unknown Source)
at sun.security.ssl.HandshakeOutStream.flush(Unknown Source)
at sun.security.ssl.ClientHello$ClientHelloKickstartProducer.produce(Unknown Source)
at sun.security.ssl.SSLHandshake.kickstart(Unknown Source)
at sun.security.ssl.ClientHandshakeContext.kickstart(Unknown Source)
at sun.security.ssl.TransportContext.kickstart(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(Unknown Source)
at s.uAV.(:161)
at java.lang.Thread.run(Unknown Source)
WARNING: Unable to ping server: us.esotericsoftware.com
[net.Socket] Connection reset by peer
at sun.nio.ch.NioSocketImpl.implWrite(Unknown Source)
at sun.nio.ch.NioSocketImpl.write(Unknown Source)
at sun.nio.ch.NioSocketImpl$2.write(Unknown Source)
at java.net.Socket$SocketOutputStream.write(Unknown Source)
at sun.security.ssl.SSLSocketOutputRecord.flush(Unknown Source)
at sun.security.ssl.HandshakeOutStream.flush(Unknown Source)
at sun.security.ssl.ClientHello$ClientHelloKickstartProducer.produce(Unknown Source)
at sun.security.ssl.SSLHandshake.kickstart(Unknown Source)
at sun.security.ssl.ClientHandshakeContext.kickstart(Unknown Source)
at sun.security.ssl.TransportContext.kickstart(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(Unknown Source)
at s.uAV.(:161)
at java.lang.Thread.run(Unknown Source)
NVIDIA Corporation, NVIDIA GeForce RTX 4070 Ti/PCIe/SSE2, 4.6.0 NVIDIA 560.81
WARNING: Unable to ping server: eu.esotericsoftware.com
[net.Socket] Connection reset by peer
at sun.nio.ch.NioSocketImpl.implWrite(Unknown Source)
at sun.nio.ch.NioSocketImpl.write(Unknown Source)
at sun.nio.ch.NioSocketImpl$2.write(Unknown Source)
at java.net.Socket$SocketOutputStream.write(Unknown Source)
at sun.security.ssl.SSLSocketOutputRecord.flush(Unknown Source)
at sun.security.ssl.HandshakeOutStream.flush(Unknown Source)
at sun.security.ssl.ClientHello$ClientHelloKickstartProducer.produce(Unknown Source)
at sun.security.ssl.SSLHandshake.kickstart(Unknown Source)
at sun.security.ssl.ClientHandshakeContext.kickstart(Unknown Source)
at sun.security.ssl.TransportContext.kickstart(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(Unknown Source)
at s.uAV.(:161)
at java.lang.Thread.run(Unknown Source)
ERROR: Unable to authenticate activation code: The connection to the server was lost.
[error] Unable to connect to server: https://usapi.esotericsoftware.com:443
at s.tTm.(:275)
at s.tTm.F(:128)
at s.soV.F(:277)
at s.yQC.(:285)
at s.yQC.F(:163)
at s.nvs.D(:107)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Cause: [net.Socket] Connection reset by peer
at sun.nio.ch.NioSocketImpl.implWrite(Unknown Source)
at sun.nio.ch.NioSocketImpl.write(Unknown Source)
at sun.nio.ch.NioSocketImpl$2.write(Unknown Source)
at java.net.Socket$SocketOutputStream.write(Unknown Source)
at sun.security.ssl.SSLSocketOutputRecord.flush(Unknown Source)
at sun.security.ssl.HandshakeOutStream.flush(Unknown Source)
at sun.security.ssl.ClientHello$ClientHelloKickstartProducer.produce(Unknown Source)
at sun.security.ssl.SSLHandshake.kickstart(Unknown Source)
at sun.security.ssl.ClientHandshakeContext.kickstart(Unknown Source)
at sun.security.ssl.TransportContext.kickstart(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(Unknown Source)
at s.tTm.(:256) ...

解決策はありますでしょうか。
また、オフラインでも起動できるようにする方法はありませんか？