Raised this in Discord here.

Including details here for completeness.

How much do we love questions related to empty DPI graphs?

Ive run through all the suggestions at https://unpoller.com/docs/help/common

My env:
docker via docker compose on Linux with Prometheus and Grafana, all latest container releases,
unpoller debug logs not showing any errors,
unpoller debug logs showing minimal data return from the Network Controller API for DPI status I think: 2025/05/18 07:01:01.759511 updateweb.go:223: [DEBUG] Requested https://homegw.2ld/proxy/network/api/s/default/stat/stadpi: elapsed 3ms, returned 30 bytes,
Unpoller container environment: config:,
environment:
- UP_INFLUXDB_DISABLE=true
- UP_POLLER_DEBUG=true
- UP_UNIFI_DYNAMIC=false
- UP_PROMETHEUS_HTTP_LISTEN=0.0.0.0:9130
- UP_PROMETHEUS_NAMESPACE=unpoller
- UP_UNIFI_CONTROLLER_0_PASS=${UP_UNIFI_CONTROLLER_0_PASS}
- UP_UNIFI_CONTROLLER_0_SAVE_ALARMS=true
- UP_UNIFI_CONTROLLER_0_SAVE_ANOMALIES=true
- UP_UNIFI_CONTROLLER_0_SAVE_DPI=true
- UP_UNIFI_CONTROLLER_0_SAVE_EVENTS=true
- UP_UNIFI_CONTROLLER_0_SAVE_IDS=false
- UP_UNIFI_CONTROLLER_0_SAVE_SITES=true
- UP_UNIFI_CONTROLLER_0_URL=${UP_UNIFI_CONTROLLER_0_URL}
- UP_UNIFI_CONTROLLER_0_USER=${UP_UNIFI_CONTROLLER_0_USER}

Unifi gateway is a UDM-SE running FW 4.2.12 and Network App 9.2.79,
Other dashboards have data/stats no problem.

Confirming that DPI is enabled in my Network app:

As noted by others in the above thread:

Xenastry:

Having the same behavior. Assuming the rebrand of DPI is "Device and Traffic Identification"

When trying to pull the data myself at https:///proxy/network/api/s/default/stat/sitedpi I get blank json {"meta":{"rc":"ok"},"data":[{}]}

I will get a dump of the new endpoint shortly and add it here in a bit. Just wanted to get this Issue onto the table.