WARNING Not Found: /tunnelws/ticket/~~

[colaH16]

Docker logs -f "docker continaer name" to guacd and guacozy to view the logs.
When I type curl 'guacd:4822' on guacozy container, guacd container throws an error: "Guacamole protocol violation. Perhaps the version of guacamole-client is incompatible with this version of guacd?"

However, even if a connection is executed in guacozy web, no logs in guacd.
maybe not trying to reach to guacd from guacozy.

In addition, if I run connection in guacozy, I can see these logs in guacozy docker.
"WARNING Not Found: /tunnelws/ticket/c30fa7d1-b334-4259-ad71-35804a3d9911"
or
"WARNING Not Found: /tunnelws/ticket/e37b6e69-9e7a-4fa0-b083-2eda8c86809a/"
like these.

How can I test that guacozy can connect to gaucd.
what can I do?
thank you.