TV tuner not found; tuner server fails to start

Server Version#: 1.22.3.4392-d7c624def-x86
Tuner Make/Model: WinTV HVR-2250
OS: Windows Server 2016

Trying to use a WinTV-HVR-2250 tuner with Plex. When I go to DVR setup in Plex, it sits and spins at “Looking for compatible devices…”.

Looking at the logs, the Plex Tuner Service fails to start:

Apr 29, 2021 20:47:00.678 [4652] DEBUG - [ChildProcessMonitor] Plex Tuner Service.exe starting.
Apr 29, 2021 20:47:00.678 [4652] DEBUG - [ChildProcessMonitor/JobRunner] Job running: "C:\Plex\Plex Media Server\Plex Tuner Service.exe" "C:\Plex\Plex Media Server\Resources\Tuner\Private" "C:\Plex\Plex Media Server\Resources\Tuner\Shared" 1.22.3.4392-d7c624def 32600 
Apr 29, 2021 20:47:00.679 [4652] ERROR - [ChildProcessMonitor/JobRunner] exec of C:\Plex\Plex Media Server\Plex Tuner Service.exe failed: error 
Apr 29, 2021 20:47:00.679 [4652] ERROR - [ChildProcessMonitor/JobRunner]     Win32 Error: 5 Access is denied.
Apr 29, 2021 20:47:00.679 [4652] DEBUG - [ChildProcessMonitor/JobRunner] Jobs: Starting child process with pid 0
Apr 29, 2021 20:47:00.679 [4652] ERROR - [ChildProcessMonitor] Plex Tuner Service.exe failed to start

Things I’ve tried/verified:

  • Process is running as Administrator user.
  • Uninstalled/reinstalled.
  • Installed into non-standard directory (i.e., outside Program Files).
  • Changed ownership of install directory to Administrator user. Verified user has full control of the directory/sub-directories.
  • Process monitor logs don’t reveal any apparent errors.
  • I verified the TV tuner is working outside of Plex. I installed WinTV 7 and verified I can watch TV. (I am aware of potential conflicts with WinTV software - this was happening before installing WinTV.)

Any ideas?

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