please check your internet connection

I purchased Hanakuma Chifuyu AI, but when activating it, the program prompts please check your internet connection.
For some reason, my computer can only access the internet through my phone’s mobile hotspot. But before, my software was still able to detect the update.
I tried turning off the firewall, changing the network connection (wireless hotspot → wired connection), and turning off the proxy, but nothing worked.
I don’t know if this is due to the changes I made to the system settings unintentionally. I don’t really know about this. I hope someone can tell me how to solve this problem. Thank you very much!

我购买了Synthesizer V 花隈千冬,但是在激活时,程序提示“请检查您的网络连接”。
因为一些原因,我的电脑只能通过手机的移动热点上网。但是在之前,我的软件仍然能够检测到更新。
我试着关闭了防火墙,更改网络连接方式(无线热点→有线连接),关闭了代理,但都没有效果。
我不知道是否是由于我无意中对系统设置的更改才导致如此。我并不了解这些。希望有人可以告诉我要如何解决这个问题。非常感谢!