flutter doctor - Error: Downloading Dart SDK from Flutter engine

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Steps to Reproduce


Android SDK, Git already installed. Flutter git was cloned successfully.
Running flutter doctor in PowerShell


Logs

C:\flutter>flutter doctor
Checking Dart SDK version...
Downloading Dart SDK from Flutter engine ead227f...
Start-BitsTransfer : flutter doctor - 69/5000 The resource loader cache doesn't have a loaded MUI entry . (HRESULT: 0x80073B01 Exception)
En C:\flutter\flutter\bin\internal\update_dart_sdk.ps1: 47 Character: 1

Start-BitsTransfer -Source $dartSdkUrl -Destination $dartSdkZip
+ CategoryInfo : NotSpecified: (:) [Start-BitsTransfer], COMException
+ FullyQualifiedErrorId : System.Runtime.InteropServices.COMException,Microsoft.BackgroundIntelligentTransfer.Mana
gement.NewBitsTransferCommand

Error: Unable to update Dart SDK. Retrying...

Waiting 2 seconds, press CTRL+C to exit ...


I'm using NTLM auth behind corporate proxy.

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