R104
native() on a preset that can't run it (no file system for an addon or a .wasm), on a preset with no WASM when wasm: false is set, or a .wasm that won't build (a warning on a preset the addon runs on). At run time, a build with neither for this platform (503).
Fix: Use remote('rust://<name>'), the same crate behind weft::router. rustup target add wasm32-unknown-unknown, or rust.services.<name>.wasm: false if nothing needs a fallback.
Status in weft@0.1.0: reported by weft check.