Store: Unhandled Promise rejection: Can't resolve all parameters for InsiderState: (?, ?). ; Zone: <root> ; Task: Promise.then ; Value: Error: Can't resolve all parameters for InsiderState: (?, ?).

[bhandaribhumin]

Hey team after update to ionic 5 my project is not working may be ngxs/store is going to reject? i am not sure where i am wrong but in runtime i am getting an error!

Unhandled Promise rejection: Can't resolve all parameters for InsiderState: (?, ?). ; Zone: <root> ; Task: Promise.then ; Value: Error: Can't resolve all parameters for InsiderState: (?, ?).

My package.json

{
  "dependencies": {
    "@angular/common": "~10.0.0",
    "@angular/core": "~10.0.0",
    "@angular/forms": "~10.0.0",
    "@angular/platform-browser": "~10.0.0",
    "@angular/platform-browser-dynamic": "~10.0.0",
    "@angular/router": "~10.0.0",
    "@ionic-native/core": "^5.0.0",
    "@ionic/angular": "^5.0.0",
    "@ngxs/devtools-plugin": "^3.7.1",
    "@ngxs/logger-plugin": "^3.7.1",
    "@ngxs/router-plugin": "^3.7.1",
    "@ngxs/schematics": "0.0.1-alpha.5",
    "@ngxs/storage-plugin": "^3.7.1",
    "@ngxs/store": "^3.7.1",
    "hammerjs": "^2.0.8",
    "immer": "^8.0.0",
    "node-sass": "^4.14.1",
    "rxjs": "~6.5.5",
    "tslib": "^2.0.0",
    "zone.js": "~0.10.3"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.1000.0",
    "@angular/cli": "~10.0.5",
    "@angular/compiler": "~10.0.0",
    "@angular/compiler-cli": "~10.0.0",
    "@angular/language-service": "~10.0.0",
    "@ionic/angular-toolkit": "^2.3.0",
    "@types/jasmine": "~3.5.0",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "^12.11.1",
    "codelyzer": "^6.0.0",
    "jasmine-core": "~3.5.0",
    "jasmine-spec-reporter": "~5.0.0",
    "karma": "~5.0.0",
    "karma-chrome-launcher": "~3.1.0",
    "karma-coverage-istanbul-reporter": "~3.0.2",
    "karma-jasmine": "~3.3.0",
    "karma-jasmine-html-reporter": "^1.5.0",
    "protractor": "~7.0.0",
    "ts-node": "~8.3.0",
    "tslint": "~6.1.0",
    "typescript": "~3.9.5"
  },

}

[xavidram]

This occurs because you are missing the @Injectable() tag between your @State and Class definition. For example

@State<InsiderStateModel>()
@Injectable()
export class InsiderState {
    constructor() {}
}

This error becomes present when migrating to any angular 9+ projects.

[bhandaribhumin]

Thanks @xavidram