giving error on live server

[yasir-rafiq]

Mongoui web app is listening on: 3001
(node:6765) UnhandledPromiseRejectionWarning: Error: Exited with code 3
at ChildProcess. (/usr/local/lib/node_modules/mongoui/node_modules/opn/index.js:83:13)
at Object.onceWrapper (events.js:286:20)
at ChildProcess.emit (events.js:198:13)
at maybeClose (internal/child_process.js:982:16)
at Socket.stream.socket.on (internal/child_process.js:389:11)
at Socket.emit (events.js:198:13)
at Pipe._handle.close (net.js:606:12)
(node:6765) 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:6765) [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.