Solution - Value cannot be null. Parameter name paths at System.IO.Path.Combine(String[] paths) at Microsoft.TemplateEngine.Utils.EngineEnvironmentSettings.DefaultPathInfo.get_BaseDir()

2018-09-25T21:24:45.2778646Z ERROR: Error: Value cannot be null.
2018-09-25T21:24:45.2791049Z Parameter name: paths
2018-09-25T21:24:45.2804472Z    at System.IO.Path.Combine(String[] paths)
2018-09-25T21:24:45.2818339Z    at Microsoft.TemplateEngine.Utils.EngineEnvironmentSettings.DefaultPathInfo.get_BaseDir()
2018-09-25T21:24:45.2832030Z    at Microsoft.TemplateEngine.Edge.Paths.UserPaths.get_AliasesFile()
2018-09-25T21:24:45.2845669Z    at Microsoft.TemplateEngine.Edge.Settings.AliasRegistry.EnsureLoaded()
2018-09-25T21:24:45.2859343Z    at Microsoft.TemplateEngine.Edge.Settings.AliasRegistry.TryExpandCommandAliases(IReadOnlyList`1 inputTokens, IReadOnlyList`1& expandedInputTokens)
2018-09-25T21:24:45.2874783Z    at Microsoft.TemplateEngine.Cli.AliasSupport.TryExpandAliases(INewCommandInput commandInput, AliasRegistry aliasRegistry)
2018-09-25T21:24:45.2888665Z    at Microsoft.TemplateEngine.Cli.AliasSupport.CoordinateAliasExpansion(INewCommandInput commandInput, AliasRegistry aliasRegistry, ITelemetryLogger telemetryLogger)
2018-09-25T21:24:45.2902455Z    at Microsoft.TemplateEngine.Cli.New3Command.ExecuteAsync()
2018-09-25T21:24:45.2915947Z    at Microsoft.TemplateEngine.Cli.CommandParsing.NewCommandInputCli.<>c__DisplayClass19_0.<<OnExecute>b__0>d.MoveNext()

```markdown

Tracked it down to this line of code:
[https://github.com/dotnet/templating/blob/4bd80f0577550c7f36867b53d0c074f8f3dcde17/src/Microsoft.TemplateEngine.Utils/EngineEnvironmentSettings.cs#L60](https://github.com/dotnet/templating/blob/4bd80f0577550c7f36867b53d0c074f8f3dcde17/src/Microsoft.TemplateEngine.Utils/EngineEnvironmentSettings.cs#L60)

```cs

string profileDir = _parent.Environment.GetEnvironmentVariable(isWindows
                            ? "USERPROFILE"
                            : "HOME");