后端启动后启动前端，然后发生error

[KentaIbayashi]

webpack:///./src/app/redux/utils/graphql.ts?:125
                            resolve(result.data[apis[0].aliases || apis[0].api]);
                                               ^

TypeError: Cannot read property 'sitemap' of undefined
    at _callee$ (webpack:///./src/app/redux/utils/graphql.ts?:125:48)

I've got this error..... How can I fix this? After run api server, I have already written config file in frontend as localhost:3000.