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Install the latest dev build of the Pulumi CLI:

*Linux / macOS*

```curl -sSL <https://get.pulumi.com> | sh -s -- --version dev```
*Windows*

Open a new command prompt window (`WIN`+`R`: `cmd.exe`)

```@"%SystemRoot%\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -InputFormat None -ExecutionPolicy Bypass -Command "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; iex ((New-Object System.Net.WebClient).DownloadString('<https://get.pulumi.com/install.ps1'))> -version dev" &amp;&amp; SET "PATH=%PATH%;%USERPROFILE%\.pulumi\bin"```
*GitHub Action*

```- uses: pulumi/actions@v5
  with:
    pulumi-version: dev```

Thanks! Is this related to any language or only `go` implementations?

we are having exact same problem in self managed backend but for Azure... pulumi versions above 3.104.1 all fail with bad request.. which, could be a regression ..?!

<@U01PC1QP7C3>, does <https://github.com/pulumi/pulumi/pull/15375> look like the issue you’re hitting? We just released a fix for that in 3.105.0.

If not, can you open a new issue with more details? <https://github.com/pulumi/pulumi/issues/new/choose>

hi Justin, I've added a request for help here earlier on... my issue is to do with authentication and receiving back a badrequest, it could be adding that flag may help but seems unrelated. <https://pulumi-community.slack.com/archives/CRVK66N5U/p1707414105735399>