Continuously kicked out of the game server

I'm not sure if it's my network problem or something else, but when I log in to my account, it keeps prompting 'server disconnected'.
Even if you successfully log in to the game, you will still be kicked out of the game on the map switching page, and the message 'Server disconnected' will be displayed.
Five hours ago, I was still playing normally, but after eating, I kept having this problem. I didn't see any latest game update notifications.
I hope some experts can help me answer this question. Thank you very much.