I have followed the tutorial in https://www.youtube.com/watch?v=Cj8MHPCubuM
I am getting below error:
I am using VS 2019 in windows 10 - everything is latest as of Feb 2020

C:\Users\I868962\Documents\repos\WebApp1\yui>msbuild compressor.xml
Microsoft (R) Build Engine version 16.4.0+e901037fe for .NET Framework
Copyright (C) Microsoft Corporation. All rights reserved.

Build started 4/3/2020 8:54:55 PM.

Project "C:\Users\I868962\Documents\repos\WebApp1\yui\compressor.xml" on node 1 (default targets).

C:\Users\I868962\Documents\repos\WebApp1\yui\compressor.xml(10,5): error MSB4036: The "CompressorTask" task was not found. Check the following: 1.) The name of the task in the project file is the same as the name of the task class. 2.) The task class is "public" and implements the Microsoft.Build.Framework.ITask interface. 3.) The task is correctly declared with in the project file, or in the *.tasks files located in the "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Current\Bin" directory.
Done Building Project "C:\Users\I868962\Documents\repos\WebApp1\yui\compressor.xml" (default targets) -- FAILED.

Build FAILED.

"C:\Users\I868962\Documents\repos\WebApp1\yui\compressor.xml" (default target) (1) ->
(CompressFiles target) -> C:\Users\I868962\Documents\repos\WebApp1\yui\compressor.xml(10,5): error MSB4036: The "CompressorTask" task was not found. Check the following: 1.) The name of the task in the project file is the same as the name of the task class. 2.)The task class is "public" and implements the Microsoft.Build.Framework.ITask interface. 3.) The task is correctly declared with in the project file, or in the *.tasks files located in the "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Current\Bin" directory.

0 Warning(s)

1 Error(s)

Time Elapsed 00:00:00.06