Development Setup not working for me

I'm following [contributing doc](https://github.com/aidenybai/react-scan/blob/main/CONTRIBUTING.md), running `pnpm build` successfully, and `pnpm build:copy` inside `packages/scan`.

The I paste it on browser console, get true, but the widget of react-scan isn't appear, as it should be like in the video screenshot. I tried on multiple sites, and on both Chrome and Firefox. Has anyone encountered a similar issue?