you need to do it again
If the message "Connection refused:connect" appears when joining a server, it most likely means either the server is not currently online, or your internet is down.
Get a better computer, a better connection or join a faster server.
Turn off the proxy server and check all the other connection settings!
Obtasin a secure connection and or authenticate the client. How do i obtain a secure connection,and how do i authenticate?
The io.netty.channel.ConnectTimeoutException in Minecraft typically indicates that your client can't connect to the server due to network issues. To fix this, first ensure that your internet connection is stable and that the server address is correct. You may also want to check if the server is online or if there are any firewall settings blocking the connection. Lastly, consider restarting your router or trying to connect using a different network to rule out local issues.
format your server completely.and then try.gggoookkkuuulll
Please tell me the problems on your server.
You can fix it by reinstalling Grand Chase.
Because of your internet connection
You can't "fix the connection to Minecraft" it's all on your current holder, and bandwidth.
its not working
A back-up server is just like a repairman and a car. If a server get an eror or brakes down, the back-up server is there to fix the broken server. Hopes this helps:)