R108

A sidecar function panicked or returned an undeclared error (500). The detail stays in the sidecar's log, under the request id.

Fix: Find the request id in the sidecar's log, or declare the failure in errors.

Status in kerf@0.1.0: reported by @kerf-js/start when it serves or renders the route, and by kerf check and kerf routes --meta.