UPS plugin an Cyperpower 1500AVRLCD

I'm running OMV 2.2.1 on a Raspberry Pi 3, and I have my UPS (Cyperpower 1500 AVRLCD) connected to the Pi by USB. I installed the UPS plugin for OMV and configured with:
[cyberpower]
driver=usbhid-ups
port=auto

When I run lsusb, I see:
Bus 001 Device 004: ID 0764:0501 Cyber Power System, Inc. CP1500 AVR UPS

When I run upsc ups, however, I get:
Error: Unknown UPS

I tried running upsdrvctl manually, and I get this:
Network UPS Tools - UPS driver controller 2.6.4
Network UPS Tools - Generic HID driver 0.37 (2.6.4)
USB communication driver 0.32
Using subdriver: CyberPower HID 0.3

So I'm confused as to what's going on - it seems like NUT is using the correct driver, but why isn't it recognizing the UPS? Any help would be appreciated.

Dave

@ryecoaaron: The [cyberpower] is from the actual config file. In the web interface, cyberpower appears on the "Identifier" line, and
driver = usbhid-ups
port = auto
is in the "Driver Configuration Directives"

And as of today, still no luck. Running "upsc ups" from the command line still results in "Error: Unknown UPS" even though NUT appears to be loading the correct driver.