after serving it gives firebase messaging is not a function

[harshithmullapudi]

I have built the project and then served it after which
TypeError: firebase.messaging is not a function
at new MessagingService (/home/nani/Documents/eventbeep/universal-starter/dist/server.js:130045:35)
at _createClass (/home/nani/Documents/eventbeep/universal-starter/dist/server.js:12311:20)
at createProviderInstance (/home/nani/Documents/eventbeep/universal-starter/dist/server.js:12281:26)
at resolveNgModuleDep (/home/nani/Documents/eventbeep/universal-starter/dist/server.js:12244:21)
at NgModuleRef.get (/home/nani/Documents/eventbeep/universal-starter/dist/server.js:12952:16)
at resolveDep (/home/nani/Documents/eventbeep/universal-starter/dist/server.js:13317:45)
at createClass (/home/nani/Documents/eventbeep/universal-starter/dist/server.js:13197:32)
at createDirectiveInstance (/home/nani/Documents/eventbeep/universal-starter/dist/server.js:13074:20)
at createViewNodes (/home/nani/Documents/eventbeep/universal-starter/dist/server.js:14294:36)
at createRootView (/home/nani/Documents/eventbeep/universal-starter/dist/server.js:14208:5)