use-fetch-hook | A custom hook to fetch and cache data | Frontend Utils library

I've created a custom hook useLUGet that is intended just to be a wrapper around some axios calls. I followed (mostly) this repo, which works fine by itself because the App.js there triggers the call by an onSubmit event. In my case I just want to load a drop down list when the page loads. Normally I would do that with useEffect(()=>{...}, []) with the empty array so it fires just one, but I'm getting the dreaded "Error: Invalid hook call. Hooks can only be called inside of the body of a function component." The last real message logged to the console is "in useLUGet", but there are a few console log values of "0" which I also don't understand.

Here's the guts of my code.

App.js: