已建立连接，但未连接到预期的服务器
Connection established, but not to expected server
This error means something has intercepted the connection to the Spine server. For example, if you are using WIFI or a proxy that requires login, any time you go to a web page, you are given the WIFI login page instead. It can also happen if your network configuration gives its own error page instead of allowing the communication to reach the Spine server. Some networks are configured to do that when they don't like the communication for some reason, like the site is blocked or they don't like the certificate a site is using. Spine's servers use a self signed certificate which makes sense because Spine server's are for a desktop app, not a browser. It makes sense for a network to block such a certificate for a browser, but Spine is not a browser and an exception should be made. Spine servers reject being visited using a browser.
I know you said you checked everything and you don't believe it's your network, but it's pretty clearly something with your network configuration, ISP, or somewhere else between you and the Spine server that is preventing communication. It could be a hardware or software firewall or other software, like anti-malware or antivirus software. Whatever it is, it's stopping communication from reaching Spine's servers.
Can you connect to a different network and try again? For example, a coffee shop WIFI or a friend's house or at home if you are at work. If that works, then it's definitely the network you were using before. If it doesn't work, it may indicate that the problem is the configuration or software on your computer.
