I have upgraded angular 15 to 17, in which I have also updated apollo-angular from version 4 to 10 and @apollo/client as well. Now I am getting No provider for Apollo error. main.ts:12 NullInjectorError: R3InjectorError(AppModule)[AuthService -> Apollo -> Apollo]: NullInjectorError: No provider for Apollo! at NullInjector.get (core.mjs:1654:27) at R3Injector.get (core.mjs:3093:33) at R3Injector.get (core.mjs:3093:33) at injectInjectorOnly (core.mjs:1100:40) at Module.ɵɵinject (core.mjs:1106:60) at Object.AuthService_Factory [as factory] (auth.service.ts:22:25) at core.mjs:3219:47 at runInInjectorProfilerContext (core.mjs:866:9) at R3Injector.hydrate (core.mjs:3218:21) at R3Injector.get (core.mjs:3082:33) I have tried up adding HTTPModule to app.module but still the same error exist. Continue reading...