X.py: %1 is not a valid Win32 application

3

My VSConfig (gotten from VSInstaller):

{
  "version": "1.0",
  "components": [
    "Microsoft.VisualStudio.Component.CoreEditor",
    "Microsoft.VisualStudio.Workload.CoreEditor",
    "Microsoft.VisualStudio.Component.NuGet",
    "Microsoft.VisualStudio.Component.Roslyn.Compiler",
    "Microsoft.Component.MSBuild",
    "Microsoft.VisualStudio.Component.TextTemplating",
    "Microsoft.VisualStudio.Component.IntelliCode",
    "Component.Microsoft.VisualStudio.LiveShare",
    "Microsoft.VisualStudio.Component.VC.CoreIde",
    "Microsoft.VisualStudio.Component.VC.Tools.x86.x64",
    "Microsoft.VisualStudio.Component.Graphics.Tools",
    "Microsoft.VisualStudio.Component.VC.DiagnosticTools",
    "Microsoft.VisualStudio.Component.Windows10SDK.18362",
    "Microsoft.VisualStudio.Component.Debugger.JustInTime",
    "Microsoft.VisualStudio.Component.VC.Redist.14.Latest",
    "Microsoft.VisualStudio.ComponentGroup.NativeDesktop.Core",
    "Microsoft.VisualStudio.ComponentGroup.WebToolsExtensions.CMake",
    "Microsoft.VisualStudio.Component.VC.CMake.Project",
    "Microsoft.VisualStudio.Component.VC.ATL",
    "Microsoft.VisualStudio.Component.VC.TestAdapterForBoostTest",
    "Microsoft.VisualStudio.Component.VC.TestAdapterForGoogleTest",
    "Microsoft.VisualStudio.Workload.NativeDesktop"
  ]
}

I get the same results running from the native tools command prompt as previously in both powershell and cmd.

Though launching the native tools command prompt gives the following error message before the first prompt, so maybe my VS install is more messed up than I ever realized:

'C:\Program' is not recognized as an internal or external command,
operable program or batch file.