Hello, I am currently setting up CI/CD with GitHub Actions + Pulumi and was hoping someone could provide some insight into the following error:

CommandError: code: -2
 stdout: 
 stderr: Command failed with exit code 255: pulumi stack select --stack dev --non-interactive
error: If you're using the --stack flag, pass the fully qualified name (org/project/stack)

with the following code:

name: View Infra Changes

on: [push]

env:
  PYTHON_VERSION: "3.11.4"

jobs:
  Preview:
    name: Pulumi Preview
    runs-on: ubuntu-20.04
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Set up Python ${{ env.PYTHON_VERSION }}
        uses: actions/setup-python@v4
        with:
          python-version: ${{ env.PYTHON_VERSION }}

      - name: Configure AWS Credentials
        uses: aws-actions/configure-aws-credentials@v1
        with:
          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
          aws-region: ${{ secrets.AWS_REGION }}
          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
          aws-session-token: ${{ secrets.AWS_SESSION_TOKEN }}

      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install -r requirements.txt

      - name: Pulumi Preview
        uses: pulumi/actions@v4
        with:
          command: preview
          stack-name: dev
        env:
          PULUMI_ACCESS_TOKEN: ${{ secrets.PULUMI_ACCESS_TOKEN }}

I am attempting to access dev from my individual account (not an org). Even including the project name in the "stack-name" variable, I get the same error. Does anyone have insight to how I can resolve this error?

have you tried using your username (email) for the "org" part ?

This was the solution, thanks!