Error: listen EACCES 0.0.0.0:80

[bbrinx]

After installing the dependencies successfully, running yarn start results in an error. It compiled the client and server successfully, but then suddenly fails at events.js:182

Error: listen EACCES 0.0.0.0:80
    at Object.exports._errnoException (util.js:1016:11)
    at exports._exceptionWithHostPort (util.js:1039:20)
    at Server.setupListenHandle [as _listen2] (net.js:1290:19)
    at listenInCluster (net.js:1355:12)
    at Server.listen (net.js:1455:7)
    at Function.listen (/mypath/razzle-material-ui-styled-example-master/node_modules/express/lib/application.js:618:24)
    at Object../src/index.js (/mypath/razzle-material-ui-styled-example-master/build/server.js:219:4)
    at __webpack_require__ (/mypath/razzle-material-ui-styled-example-master/build/server.js:20:30)
    at Object.15 (/mypath/razzle-material-ui-styled-example-master/build/server.js:329:18)
    at __webpack_require__ (/mypath/razzle-material-ui-styled-example-master/build/server.js:20:30)

error Command failed with exit code 1.

[kireerik]

Hi @bbrinx, may I ask you what kind of environment are you using? It is possible that something else is already running on port 80 on your system or you may need root permission to run the application on port 80. You can change the port here (you may remove that line, because the default port is 3000).