invalid value "nas1" for --exit-node; must be IP or unique node name

I am trying to use tailscale/github-action@v2 Github action. You can find my Github action code below

name: tailscale test

on:
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2

      - name: Tailscale
        uses: tailscale/github-action@v2
        with:
          authkey: ${{ secrets.TAILSCALE_AUTHKEY }}
          args: --reset --accept-routes --exit-node nas1
          hostname: github-action-${{ github.run_id }}

However, when running above action, I am getting error invalid value "nas1" for --exit-node; must be IP or unique node name

I can successfully run Tailscale using nas1 as exit node when using Tailscale CLI

sudo tailscale up --authkey "${{ secrets.TAILSCALE_AUTHKEY }}" --hostname "github-action-${{ github.run_id }}"
sudo tailscale up --reset --accept-routes --exit-node "nas1" --hostname "github-action-${{ github.run_id }}"

Could you guide me on how to debug this issue, please?

Start with the tailscale/github-action@v2 entry point and compare how its args value invokes --exit-node with the two Tailscale CLI commands shown in the issue. Reproduce the workflow using nas1, then determine what change is needed for the action to accept the same unique node name successfully.