Here is the spine log when I'm offline
Spine Launcher 4.1.11
Esoteric Software LLC (C) 2013-2022 | http://esotericsoftware.com
Windows 10 Home amd64 10.0
ATI Technologies Inc., AMD Radeon(TM) Graphics, 4.6.0 Compatibility Profile Context 22.20.44.56.230407
ERROR: Unable to start (0x137438953472): Unable to reach the server (unknown host).
[error] Unable to connect to server: https://euapi.esotericsoftware.com:443
at s.yxd._(_:277)
at s.yxd.V(_:130)
at s.unM.V(_:272)
at s.MPF._(_:280)
at s.MPF._(_:164)
at s.fWH.L(_:48)
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.UnknownHost] euapi.esotericsoftware.com
at sun.nio.ch.NioSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.security.ssl.SSLSocketImpl.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.<init>(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.New(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(Unknown Source)
at s.yxd._(_:258) ...