[SOLVED] Cannot build UWP with U2018.3.0f2 for Xbox Live

Errors include:

Code (CSharp):

1. Assets\Xbox Live\Scripts\UnityTaskExtensions.cs(13,61): error CS0433: The type 'Task' exists in both 'Unity.Tasks, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' and 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'

I've seen many others with this issue but can't seems to find a solution.

Current setup:

Window 10 Pro 1803

VS Community 2017 15.9.4

• UWP Development
  
• Windows 10 SDK (10.0.17763.0)
  
• VS Tools for Unity
  
• Nuget Package Manager
  
• NuGet targets and build tasks

XboxLive 1804 QFE2 package installed
Scripting Runtime version: .NET 4.x Equivalent
Scripting Backend: IL2CPP
API Compatibility Level: .NET 4.x

I don't have Xbox Live Platform Extensions installed. Now sure if I need these. Also, there isn't a 10.0.17763 version.

What am I missing?

 

For others:

1. In the Unity project explorer, navigate to Xbox Live\Libs\UnityEditor\NET46 and select all of the DLLs in the folder.
2. In the Inspector window, check Editor under Include Platforms.
3. In the Unity project explorer, navigate to Xbox Live\Libs\UnityEditor\NET35 and select all of the DLLs in the folder.
4. In the Inspector window, uncheck Editor under Include Platforms.

 

Thank you! This worked!
I could not find a solution anywhere for this.