fix: rearrange render logic

[brettkolodny]

Change the render logic so that we always show an error message if the error is available

[aslilac]

I often like to do

if (isLoading) {
  return <Loader />
}

if (!data) {
  return <ErrorAlert error={error} />
}

because ErrorAlert can appropriately handle getting undefined, and if it's not loading but we also don't have data, then something did go wrong.

This looks fine tho!