Assets\Microsoft.MixedReality.WebRTC.Unity\Scripts\Media\LocalVideoSource.cs(234,89): error CS0234: The type or namespace name ‘ProcessorArchitecture’ does not exist in the namespace ‘Microsoft.Windows.System’ (are you missing an assembly reference?) 
Click the error reporting line to enter the code:
Method 1: modify the official code pre instruction UNITY_ Wsa changed to UNITY_ UWP
Method 2: directly delete the official judgment, and the code judges whether it is hololens1 , Return according to your judgment True or false
I use Method two!
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