You have lost your connection to the server

Yesterday, while playing a new character for a task, I got stuck in the image reading interface. Later, when I logged in, I lost my connection to the server. Later, I tried refreshing DNS and switching to a VPN node, but I also lost my connection to the server. However, another character with the same account can still play normally. I asked a friend to try it out, but he still couldn’t get in. This problem has persisted until today, but I still can’t solve it. Please help me solve it.