Xbox Live Plugin - Namespace 'SyntaxTree' not found

Hello everyone,

So I’ve been trying to install the Xbox Live Unity plugin, but I’ve run into an issue.

I keep getting this error:

Assets\Xbox Live\Editor\XboxLivePostProcessing.cs(14,11): error CS0246: The type or namespace name 'SyntaxTree' could not be found (are you missing a using directive or an assembly reference?)

I’m currently using Unity 2019.3.0a6 and Visual Studio 2019. Visual Studio has both the Unity Tools and the .NET framework modules installed.
I’ve googled around a bit and tried to import the SyntaxTree DLL file found in the Visual Studio Unity Tools program folder, but it was no use.

Any help would be greatly appreciated, and I can clarify more about anything you’d like me to.
Thank you!

So did you see this forum thread: Error with Unity and Visual Studio Bridge (VS project not updating when new scripts added)

While not exactly the same problem as yours, maybe the solutions in this thread will work for you; they’re mostly about updating VS or re-applying VS as the “External Editor”.