CLI hangs on self-hosted runner. Is there a way to debug? (--verbose, or similar?)

[NullVoxPopuli]

I was able to test that fast-cli works well, and quickly on a GH-hosted runner: https://github.com/NullVoxPopuli/gh-runner-bandwidth-test/actions/runs/10149154613/job/28063441220#step:3:9

but have been unable to get the same results with a self-hosted runner (very similar workflow, only difference is the runs-on).

On the self-hosted runner my output is:

# 10m 0s
Run npx fast-cli --upload --json
  npx fast-cli --upload --json
  shell: /usr/bin/bash -e {0}
  env:
    CI: false
npm warn exec The following package was not found and will be installed: fast-cli@[4]

Error: The operation was canceled.

(and that's it)