Getting Error in ng serve ?

[mohammadjouhari]

ERROR in Error: Error encountered resolving symbol values statically. Calling function 'OpaqueToken', function calls are not supported. Consider replacing the function or lambda with a reference to an exported function, resolving symbol FirebaseUserConfig in C:/Users/mohammad/Desktop/My Programming World/My SPA/My Angualr/pinterest/node_modules/angularfire2/tokens.d.ts, resolving symbol AngularFireModule.initializeApp in C:/Users/mohammad/Desktop/My Programming World/My SPA/My Angualr/pinterest/node_modules/angularfire2/angularfire2.d.ts, resolving symbol AppModule in C:/Users/mohammad/Desktop/My Programming World/My SPA/My Angualr/pinterest/src/app/app.module.ts, resolving symbol AppModule in C:/Users/mohammad/Desktop/My Programming World/My SPA/My Angualr/pinterest/src/app/app.module.ts
at syntaxError (C:\Users\mohammad\Desktop\My Programming World\My SPA\My Angualr\pinterest\node_modules@angular\compiler\bundles\compiler.umd.js:1513:34)
at simplifyInContext (C:\Users\mohammad\Desktop\My Programming World\My SPA\My Angualr\pinterest\node_modules@angular\compiler\bundles\compiler.umd.js:23316:23)
at StaticReflector.simplify (C:\Users\mohammad\Desktop\My Programming World\My SPA\My Angualr\pinterest\node_modules@angular\compiler\bundles\compiler.umd.js:23328:13)
at StaticReflector.annotations (C:\Users\mohammad\Desktop\My Programming World\My SPA\My Angualr\pinterest\node_modules@angular\compiler\bundles\compiler.umd.js:22794:60)
at _getNgModuleMetadata (C:\Users\mohammad\Desktop\My Programming World\My SPA\My Angualr\pinterest\node_modules@angular\compiler-cli\src\ngtools_impl.js:126:31)
at _extractLazyRoutesFromStaticModule (C:\Users\mohammad\Desktop\My Programming World\My SPA\My Angualr\pinterest\node_modules@angular\compiler-cli\src\ngtools_impl.js:101:26)
at Object.listLazyRoutesOfModule (C:\Users\mohammad\Desktop\My Programming World\My SPA\My Angualr\pinterest\node_modules@angular\compiler-cli\src\ngtools_impl.js:52:22)
at Function.NgTools_InternalApi_NG_2.listLazyRoutes (C:\Users\mohammad\Desktop\My Programming World\My SPA\My Angualr\pinterest\node_modules@angular\compiler-cli\src\ngtools_api.js:79:39)
at AotPlugin._getLazyRoutesFromNgtools (C:\Users\mohammad\Desktop\My Programming World\My SPA\My Angualr\pinterest\node_modules@ngtools\webpack\src\plugin.js:240:66)
at C:\Users\mohammad\Desktop\My Programming World\My SPA\My Angualr\pinterest\node_modules@ngtools\webpack\src\plugin.js:493:24
at processTicksAndRejections (internal/process/task_queues.js:93:5)