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Warning : Platform '[arm64, 0]' referenced in the project file 'HeadlessChaosPerf' cannot be found

Can anyone help with the following compile errors?
Compiling UE 4.27 using VS 2017 on Windows

H:\UnrealEngine-4.27\Engine\Intermediate\ProjectFiles\HeadlessChaosPerf.vcxproj : warning : Platform ‘[arm64, 0]’ referenced in the project file ‘HeadlessChaosPerf’ cannot be found.

H:\UnrealEngine-4.27\Engine\Intermediate\ProjectFiles\HeadlessChaos.vcxproj : warning : Platform ‘[arm64, 0]’ referenced in the project file ‘HeadlessChaos’ cannot be found.

H:\UnrealEngine-4.27\Engine\Intermediate\ProjectFiles\UE4.vcxproj : warning : Platform ‘[arm64, 0]’ referenced in the project file ‘UE4’ cannot be found.

error : Designtime build failed for project ‘H:\UnrealEngine-4.27\Engine\Intermediate\ProjectFiles\UnrealRecoverySvc.vcxproj’ configuration ‘Development_Program|x64’. IntelliSense might be unavailable.
Set environment variable TRACEDESIGNTIME = true and restart Visual Studio to investigate.