Screenshot please.
It is the same problem as the following link.
https://www.traccar.org/forums/topic/web-socket-connection-error4/
Error message is different from what you said in your original comment.
Excuse me Anton,
The error is the same as the link that happened before. Why is this error shown?
Have you read comments from your link? Answer is there.
Ok, Thank you very much
Hello Anton,
Continuously the Error: "Error in web connection" Why does this happen?
Thank you very much,
A greeting.