X_ROUTE_STATUS_INVALID
Means
a route answered a status a rendered page cannot carry
Typical cause
withStatus(302, data) — a 3xx is a Location and no body, and a loader only ever produces a body
Fix
answer 2xx, 4xx or 5xx from load; a redirect is redirect(location) from @ultimat3/http. Out of 200–599 is X_INVARIANT from the same screen every render mode uses