Same error while running index.js for the first time. This time I didn’t even update Raspbian, just installed v8.11.3 of node and assistant relay. thats all.
(node:1423) UnhandledPromiseRejectionWarning: Error: Exited with code 3 at ChildProcess.cp.once.code (/home/pi/assistant-relay/node_modules/opn/index.js:84:13) at Object.onceWrapper (events.js:317:30) at emitTwo (events.js:126:13) at ChildProcess.emit (events.js:214:7) at maybeClose (internal/child_process.js:925:16) at Socket.stream.socket.on (internal/child_process.js:346:11) at emitOne (events.js:116:13) at Socket.emit (events.js:211:7) at Pipe._handle.close [as _onclose] (net.js:557:12) (node:1423) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1) (node:1423) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.