The "X11 connection rejected because of wrong authentication" error can occur when you are trying to connect to an X11 server using an incorrect authentication method or credentials. This can happen when you are using a remote desktop client to connect to a Linux system running an X11 server, or when you are using ssh with X11 forwarding to connect to a remote system.
To resolve this issue, you will need to ensure that you are using the correct authentication method and credentials when connecting to the X11 server. Here are some steps you can try:
Make sure that you are using the correct username and password when connecting to the X11 server.
If you are using ssh with X11 forwarding, ensure that the "ForwardX11" option is enabled in your ssh configuration.
If you are using a remote desktop client to connect to the X11 server, ensure that the client is configured to use the correct authentication method. Some common methods include password-based authentication and public key authentication.
Check the X11 server's configuration to ensure that it is configured to accept connections from the client. This may involve modifying the "xauth" or "xhost" configuration files on the server.
If you are using a firewall on the server or client, ensure that it is configured to allow X11 traffic.
If the issue persists, you may need to troubleshoot the network connection between the client and server to ensure that it is stable and secure.
Keep in mind that the steps required to resolve this issue may vary depending on your specific setup and configuration. If you are unable to resolve the issue on your own, you may need to seek additional help or guidance from your system administrator or the vendor of the remote desktop client or ssh software you are using.