UnhandledPromiseRejectionWarning

[zaszlo]

I just cloned the project, ran npm install, turned the spring server on, and for npm start got the following:

(node:347) UnhandledPromiseRejectionWarning: Error: Exited with code 3
    at ChildProcess.<anonymous> (/mnt/c/git/reach-security/angular-springboot-jwt/node_modules/opn/index.js:83:13)
    at Object.onceWrapper (events.js:219:13)
    at ChildProcess.emit (events.js:127:13)
    at maybeClose (internal/child_process.js:933:16)
    at Socket.stream.socket.on (internal/child_process.js:353:11)
    at Socket.emit (events.js:127:13)
    at Pipe._handle.close [as _onclose] (net.js:550:12)
(node:347) 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:347) [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.