The action itself is very simple:

permissions:
  id-token: write
  contents: read # This is required for actions/checkout
jobs:
  unit-tests:
    name: Run unit tests
    runs-on: ubuntu-latest
    timeout-minutes: 20
    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - name: Install Python
        uses: actions/setup-python@v4
        with:
          python-version: "3.8"
      - name: Configure AWS credentials
        uses: aws-actions/configure-aws-credentials@v1
        with:
          role-to-assume: arn:aws:iam::***:role/github-actions
          aws-region: us-west-2
      - name: Install GDAL
        run: |
          sudo apt-add-repository ppa:ubuntugis/ubuntugis-unstable
          sudo apt-get update
          sudo apt-get install gdal-bin libgdal-dev
      - name: Run unit tests and get coverage
        run: |
          set -e
          set -o pipefail
          ./pants --changed-since=origin/main --changed-dependees=transitive test

Failure happens on the

Run unit tests and get coverage

step

I should point out that several other actions were run successfully at the same time as this one, and they include the line

SHA256 fingerprint of <https://github.com/pantsbuild/pex/releases/download/v2.1.62/pex> verified.

So for some reason, it's only that action that is having trouble with the pex release.

Actually it looks like it cleared itself out overnight, it's working now.