Weird error showing up every 10 seconds in browser console

Hi friends,
I am getting this weird error every 10 seconds. I am using version 12.
This is annoying me while debugging through the browser console.
Any idea whats the problem behind?

If you share/show the error, then the community might be able to help

oops! sorry forget to upload

Do you have port 90 on localhost accessible?

Hey after adding port 9000 in my VM Port Forwarding, error is gone.
HostPort: 9000 GuestPort: 9000