Hi @Blarry8238,
Same issues here but resolved now.
Have a go at the following in this order. Seemed to fix my issues.
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Uninstall all Tobii software and drivers as per this post: Making Tobii eye tracker work with SU8 - Community Help Center / Peripherals - Microsoft Flight Simulator Forums
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If you have previously used OpenTrack, Track IR etc, reinstall them one by one then remove them with Revo making sure all the registry entries/drivers etc are also gone.
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Reinstall Tobii and the drivers via this post. Installation or setup issues for Tobii Eye Tracker 5 – Tobii Support
In my case, I had to then remove and reinstall Tobii once more but it then worked. in MSFS and all other games.