On: Show HN: Improve cognitive focus in 1 minute

[8ed30dc]

I just get some error after gray ball was dispear from screen

Application error: a client-side exception has occurred (see the browser console for more information).

main-b85113564a892656.js:1 DOMException: Failed to execute 'removeChild' on 'Node': The node to be removed is not a child of this node.