Error: No artifacts named "github-pages" were found for this workflow run.

• Was ran with debug logging on
• Tried many solutions before coming here
• permissions appear to be correctly set
• steps are sequentially correct

From actions/update-pages-artifact step

##[debug]Starting: run
##[debug]Loading inputs
##[debug]Evaluating: inputs.name
##[debug]Evaluating Index:
##[debug]..Evaluating inputs:
##[debug]..=> Object
##[debug]..Evaluating String:
##[debug]..=> 'name'
##[debug]=> 'github-pages'
##[debug]Result: 'github-pages'
...
##[debug]Artifact github-pages has been successfully uploaded, total size in bytes: 133120

From "Artifacts" section in summary

From actions/deploy-pages

##[debug]Headers: {
##[debug]  "content-length": "16",
##[debug]  "content-type": "application/json",
##[debug]  "date": "*** GMT",
##[debug]  "x-github-backend": "Kubernetes",
##[debug]  "x-github-request-id": "***"
##[debug]}
##[debug]Body: {
##[debug]  "artifacts": []
##[debug]}
Found 0 artifact(s)
##[debug]List artifact count: 0
Error: Fetching artifact metadata failed. Is githubstatus.com reporting issues with API requests, Pages, or Actions? Please re-run the deployment at a later time.
Error: Error: No artifacts named "github-pages" were found for this workflow run. Ensure artifacts are uploaded with actions/artifact@v4 or later.
    at getArtifactMetadata (/home/runner/work/_actions/actions/deploy-pages/v4/src/internal/api-client.js:85:1)
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at Deployment.create (/home/runner/work/_actions/actions/deploy-pages/v4/src/internal/deployment.js:66:1)
    at main (/home/runner/work/_actions/actions/deploy-pages/v4/src/index.js:30:1)
Error: Error: No artifacts named "github-pages" were found for this workflow run. Ensure artifacts are uploaded with actions/artifact@v4 or later.
##[debug]Node Action run completed with exit code 1

Workflow

name: Build & Deploy Demo
on:
  workflow_dispatch:
  push:
    branches: [main]

jobs:

  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      pages: write
      id-token: write
    steps:
      - uses: actions/checkout@v3

      - name: Set up Node.js
        uses: actions/setup-node@v3
        with:
          node-version: '20' # Use a Node.js version that supports ES Modules
          registry-url: 'https://registry.npmjs.org'

      - name: Install Dependencies
        run: yarn install

      - name: Build Package
        run: yarn build

      - name: Upload artifact
        uses: actions/upload-pages-artifact@v2
        with:
          name: 'github-pages'
          path: 'dist'

  deploy:
    runs-on: ubuntu-latest
    needs: build
    permissions:
      contents: read
      pages: write
      id-token: write
    steps:
      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@v4

❓ ❓ ❓

Start with the workflow shown in the issue, especially the upload-pages-artifact and deploy-pages steps, then inspect actions/deploy-pages/v4/src/internal/api-client.js and deployment.js around artifact lookup. Reproduce the run and compare the uploaded artifact details with the API response showing an empty artifact list; done means the cause of the missing artifact is identified and the deployment behavior is corrected or clearly documented.