During development, this “0” error looks like this:
https://github.com/elm/core/blob/1.0.5/src/Elm/Kernel/Debug.js#L244
throw new Error('What node should I take over? In JavaScript I need something like:\n\n Elm.Main.init({\n node: document.getElementById("elm-node")\n })\n\nYou need to do this with any Browser.sandbox or Browser.element program.');
But in production, it looks like this:
https://github.com/elm/core/blob/1.0.5/hints/0.md
Your application is triggering a bug in the Dict module of this library!