Iam trying to run a ionic2,angular2 application as per this github link using command ionic serve --lab https://github.com/chsakell/ionic2-angular2-firebase/issues

Iam getting following error message TypeError: Cannot read properties of undefined (reading 'annotations') at ReflectionCapabilities.annotations (http://localhost:8100/build/vendor.js:18711:24) at Reflector.annotations (http://localhost:8100/build/vendor.js:18829:44) at NgModuleResolver.resolve (http://localhost:8100/build/vendor.js:15969:44) at CompileMetadataResolver.getNgModuleMetadata (http://localhost:8100/build/vendor.js:15226:47) at RuntimeCompiler._compileComponents (http://localhost:8100/build/vendor.js:26691:47) at RuntimeCompiler.compileModuleAndComponents (http://localhost:8100/build/vendor.js:26629:37) at RuntimeCompiler.compileModuleAsync (http://localhost:8100/build/vendor.js:26620:21) at PlatformRef.bootstrapModuleWithZone (http://localhost:8100/build/vendor.js:11187:25) at PlatformRef.bootstrapModule (http://localhost:8100/build/vendor.js:11169:21) at Object.176 (http://localhost:8100/build/main.js:30:109)

When I lookup vendor.js it is this line if (typeOrFunc.annotations) { I dont know where typeOrFunc is defined.. Any help or pointers pls..Thanks in advance