The Radix node metrics endpoint in version 1.1.0 has changed from /metrics to /prometheus/metrics
Prometheus
You will need to update your Prometheus metrics_path in your /etc/prometheus/prometheus.yml for the job that scrapes the Radix node metrics.
nginx
If you are using an Nginx reverse proxy on your node, ensure that the location in /etc/nginx/conf.d/metrics-conf.conf has been changed from /metrics to /prometheus/metrics