Failed to duplicate the user token for Split

[znerol75]

Checking Event View, there is a consistent error popping up: "Failed to duplicate the user token for Split" (Split being the name of my instance). I suspect this is the reason why I am unable to open Sunshine's WebUI and why device pairing fails. I assume this is related to the way Duo logs in to its associated accounts.

[hikkianimeotaku]

Same thing in Event View.
In Duo Manager (Instance settings) all connected to Sunhine buttons are inactive.
Also, I tried to run Sunshine from Duo directory. It can't start. According to sunshine.log, after trying all available encoders process ended with error: "Video failed to find working encoder".
But last version of standalone Sunshine works perfect.

[sgarmonsway]

I'm getting this problem too. I've been trying to troubleshoot all day without any luck.

[scootsy]

Not sure if this is the same issue or just related, but I'm getting the exact symptoms you describe: the token duplication error, WebUI won't open, pairing fails, buttons grayed out, etc.

It works fine on a fresh boot, the second session spawns fine and streaming works. But as soon as I log into my main profile on the host PC, Windows throws "too many users signed in" and forces me to disconnect the Duo account. After that it's dead exactly like you're describing, and won't work again until I do a full cold reboot.

I'm not very technical so I used AI to help troubleshoot. Its guess was that the forced disconnect leaves the concurrent session patch (termsrv) in a broken state, so logging the Duo account back in afterward fails. No idea if that's actually what's going on.

I also use this machine as a normal PC, so I'm cold booting and logging in and out often, which might be why I keep hitting it. Can share debug logs if useful. I'm on Windows 11 25H2 if that matters.

[skywayskase]

I noticed this happening to me after KB5089573 was installed. Uninstalling the update and then uninstalling/reinstalling Duo didn't seem to resolve the issue. I ended up uninstalling Duo, then running DISM.exe /Online /Cleanup-image /Restorehealth and SFC /scannow, rebooted, and then reinstalled Duo and now it seems to be working, for the time being.

[scootsy]

@skywayskase your solution worked for me to get duo back up and running.

[hikkianimeotaku]

@skywayskase Thank you! I confirm, your solution works.
I followed those steps:

1. Uninstall DUO.
2. Uninstall KB5089573.
3. Reboot.
4. DISM and SFC.
5. Reboot.
6. Install DUO.
   And Duo (and Sunshine as part of it) is working now!

[sgarmonsway]

Just to make sure I'm on the same page. You guys are using Duo Manager 1.5.7? Do you have the Duo Manager Fix installed from back on version 1.5.6?

[sgarmonsway]

I've been trying to uninstall KB5089573 but every time my computer restarts after removing, it encounters startup errors and needs to attempt repairs which essentially just rolls back the removal and reinstates KB5089573. I've been trying all sorts from manually installing Hyper-V and gpedit.msc on my win11 home, manual registry and group policy changes, and to resetting windows from an ISO. Nothing seems to get me past this failure to duplicate token thing :(

[sgarmonsway]

I can confirm update 1.5.8 has fixed this issue for me without the need to uninstall the windows update. Thanks @Black-Seraph !!