core.mjs:8453 ERROR ApolloError: Http failure response for http://localhost:4200/graphql: 400 Bad Request
at new ApolloError (index.js:29:28)
at Object.error (QueryManager.js:144:83)
at notifySubscription (module.js:137:18)
at onNotify (module.js:176:3)
at SubscriptionObserver.error (module.js:229:5)
at Object.error (asyncMap.js:32:69)
at notifySubscription (module.js:137:18)
at onNotify (module.js:176:3)
at SubscriptionObserver.error (module.js:229:5)
at iteration.js:4:68
Probably not implemented on the backend yet