No channels found when scanning in Ubuntu 20.04.4

Server Version#: 1.25.6.5577-c8bd13540
Player Version#:
Tuner Make/Model: Hauppauge wintv-dual model 1595
Guide/Lineup name:
Using XMLTV?:
Channel number/Name:

i have setup Plex on my server running Ubuntu 20.04.4. it does not have a HWE Kernel.
i’ve recently installed a Hauppauge wintv-dualhd 1595 tuner.
i added the recommended ppa from the hauppauge website instructions and installed the linux mediatree.
when i go to live tv & dvr, plex recognizes the tuner. i input my country and zip code and am taken to the scan channels page.
i click on scan and it does it’s thing, then returns a no channels found error.

i connected my antenna and amplifier to my tv and it was able to find 64 channels.
then i also connected the antenna, amplifier, and 1595 to my windows laptop and installed the wintv v10 app. it found around the same amount of channels and i tried watching several channels and they all worked.

so, i know my antenna is good, it is in a good location (leds on the 1595 are green on most channels, some are yellow), and the 1595 is working.

i can’t figure out what i’m doing wrong here. i figured with as long as this combination has been around, it should work relatively easily.

when i run systemctl status i get these entries for the plex media server.

plexmediaserver.service - Plex Media Server
Loaded: loaded (/lib/systemd/system/plexmediaserver.service; enabled; vendor preset: enabled)
Active: active (running) since Sun 2022-03-06 08:31:52 CST; 50min ago
Process: 3630 ExecStartPre=/bin/sh -c /usr/bin/test -d “${PLEX_MEDIA_SERVER_APPLICATION_SUPPORT_DIR}” || /bin/mkdir -p “${PLEX_MEDIA_SERVER_APPLICATION_SUPPORT_DIR}” (code=exited, status=0/SUCCESS)
Main PID: 3641 (PMS RunServer)
Tasks: 48 (limit: 19060)
Memory: 221.4M
CGroup: /system.slice/plexmediaserver.service
├─3641 /usr/lib/plexmediaserver/Plex Media Server
├─3673 Plex Plug-in [com.plexapp.system] /usr/lib/plexmediaserver/Resources/Plug-ins-c8bd13540/Framework.bundle/Contents/Resources/Versions/2/Python/bootstrap.py --server-version 1.25.6.5577-c8bd13540 /usr/lib/plexmediaserver/Resources/Plug-ins-c8bd13540/System.bundle
└─3716 /usr/lib/plexmediaserver/Plex Tuner Service /usr/lib/plexmediaserver/Resources/Tuner/Private /usr/lib/plexmediaserver/Resources/Tuner/Shared 1.25.6.5577-c8bd13540 32600

Mar 06 08:31:52 media-server systemd[1]: Starting Plex Media Server…
Mar 06 08:31:52 media-server systemd[1]: Started Plex Media Server.

running lsusb gets me this

Bus 001 Device 005: ID 2040:826d Hauppauge

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