Change health check URL in EBS

I copied an EBS environment and was showing severe health because the environment was not pinging /healthCheck. I couldn't find where to change the "health check URL" so I updated the server to response with 200(OK) on root /

Now I'm getting Cloudwatch logs with 404 responses on /healthCheck....grrr. It's like EBS is pinging /healthCheck but listening on root /. How can I fix this?