Exception: type null is not a subtype of type string when trying to use flutter/dart

[JesseRacine]

I'm using Windows 11 and I'm trying to install Flutter/Dart. I downloaded the Flutter SDK version 3.13.2. I've unpacked it and added flutter/bin to the path. Trying to run "flutter doctor" was producing no output after installing it. I've cleared the dart cache, and now when I try to run flutter or dart I get this error:

Building flutter tool...
Running pub upgrade...
An unexpected error was encountered by the Dart CLI.
Please file an issue at https://github.com/dart-lang/sdk/issues/new with the following details:

Invocation: 'dart pub upgrade --suppress-analytics'
Exception: 'type 'Null' is not a subtype of type 'String''
Stack Trace:
#0      _Platform.resolvedExecutable (dart:io/platform_impl.dart:37:38)
#1      _Platform.resolvedExecutable (dart:io/platform_impl.dart)
#2      Platform.resolvedExecutable (dart:io/platform.dart:197:53)
#3      Sdk._createSingleton (package:dartdev/src/sdk.dart:82:58)
#4      Sdk._instance (package:dartdev/src/sdk.dart:15:32)
#5      Sdk._instance (package:dartdev/src/sdk.dart)
#6      sdk (package:dartdev/src/sdk.dart:11:21)
#7      sdk (package:dartdev/src/sdk.dart)
#8      sdkConstraint (package:dartdev/src/templates/common.dart:7:38)
#9      _pubspec (package:dartdev/src/templates/console.dart:45:12)
#10     _pubspec (package:dartdev/src/templates/console.dart)
#11     new ConsoleGenerator (package:dartdev/src/templates/console.dart:21:29)
#12     generators (package:dartdev/src/templates.dart:21:3)
#13     generators (package:dartdev/src/templates.dart)
#14     CreateCommand.legalTemplateIds (package:dartdev/src/commands/create.dart:23:23)
#15     new CreateCommand (package:dartdev/src/commands/create.dart:38:16)
#16     new DartdevRunner (package:dartdev/dartdev.dart:108:16)
#17     runDartdev (package:dartdev/dartdev.dart:58:20)
#18     main (file:///C:/b/s/w/ir/x/w/sdk/pkg/dartdev/bin/dartdev.dart:11:9)
#19     _delayEntrypointInvocation.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:292:33)
#20     _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:189:12)

Error (255): Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (9 tries left)

**The main error seems to be "Exception: 'type 'Null' is not a subtype of type 'String''.**

[JesseRacine]

It looks like this was a permissions issue in Windows. I was only able to use it as an administrator due to permissions on the flutter install folder.

[navaronbracke]

In https://docs.flutter.dev/get-started/install/windows it is stated that you should not put Flutter into a folder that requires extra privileges: Warning: Do not install Flutter in a directory like C:\Program Files\ that requires elevated privileges.

[mit-mit]

Closing as by design