Getting this Error during first Video, Before setting up Feed.component

[pranjul29]

ERROR in src/app/services/chat.service.ts(48,7): error TS2345: Argument of type '{ query: { limitToLast: number; orderByKey: boolean; }; }' is not assignable to parameter of type 'QueryFn'. Object literal may only specify known properties, and 'query' does not exist in type 'QueryFn'. ../../node_modules/rxjs-compat/Observable.d.ts(1,28): error TS2307: Cannot find module 'rxjs'. ../../node_modules/rxjs-compat/Observable.d.ts(2,70): error TS2307: Cannot find module 'rxjs'.

[rockysinghr]

go to #15