A way to address the problem when 'X11 forwarding request failed on channel 0' is shown and X11 forwarding isn't working in ssh

Let's investigate the root case. You can show details by adding '-v' option to ssh. When No auth program is shown as below, you should install xauth by apt or yum.

...
debug1: Remote: No xauth program; cannot forward with spoofing.
X11 forwarding request failed on channel 0