Suppose I have this configuration:

      - name: Remove labels
        uses: actions-ecosystem/[email protected]
        with:
          labels: |
            A
            B
            C

Suppose A and C exist, but B does not. As it currently works, the label for A will be removed, but C does not. Looking at the PR for fail_on_error, it looks like you catch an error on the outside of the loop. So, an error on any label will exit the loop.

Ideally, after an exception, the loop should continue. So, both A and C should be removed.