"UPS connection refused", but upsc output seems ok. How to debug?

[jstrebel]

Hi, I tried to add my new EATON Ellipse to my TrueNAS and get the following error:
My system: TRUENAS-13.0-U6.1

ERROR MESSAGE:
Feb 22 10:59:11 freenas 1 2024-02-22T10:59:11.132883+01:00 freenas.xxxx.yy collectd 20482 - - nut plugin: nut_connect: upscli_connect (localhost, 3493) failed: Connection failure: Connection refused

grep -i usbus | grep EATON
ugen0.12: <EATON Ellipse ECO> at usbus0
ugen0.2: <EATON Ellipse ECO> at usbus0

UPSC response:

root@freenas[~]# upsc ups@localhost
battery.charge: 100
battery.charge.low: 20
battery.runtime: 2156
battery.type: PbAc
device.mfr: EATON
device.model: Ellipse ECO 650
device.serial: 000000000
device.type: ups
driver.name: usbhid-ups
driver.parameter.pollfreq: 30
driver.parameter.pollinterval: 2
driver.parameter.port: /dev/ugen0.2
driver.parameter.synchronous: no
driver.version: 2.7.4
driver.version.data: MGE HID 1.39
driver.version.internal: 0.41
input.transfer.high: 264
input.transfer.low: 184
outlet.1.desc: PowerShare Outlet 1
outlet.1.id: 2
outlet.1.status: on
outlet.1.switchable: no
outlet.2.desc: PowerShare Outlet 2
outlet.2.id: 3
outlet.2.status: on
outlet.2.switchable: no
outlet.desc: Main Outlet
outlet.id: 1
outlet.power: 25
outlet.switchable: no
output.frequency.nominal: 50
output.voltage: 0.0
output.voltage.nominal: 230
ups.beeper.status: enabled
ups.delay.shutdown: 20
ups.delay.start: 30
ups.firmware: 02
ups.load: 0
ups.mfr: EATON
ups.model: Ellipse ECO 650
ups.power.nominal: 650
ups.productid: ffff
ups.serial: 000000000
ups.status: OL OFF
ups.timer.shutdown: 0
ups.timer.start: 0
ups.vendorid: 0463

root@freenas[~]#