can't resolve all parameters for angularindexeddb

[giamkk]

my 'ng build --prod' keep fail.
'ng build --prod' error message:
ERROR in : Can't resolve all parameters for AngularIndexedDB in C:/.../node_modules/angular2-indexeddb/angular2-indexeddb.ts: (?, ?).

same as my 'ng serve' error message:
Error: Can't resolve all parameters for AngularIndexedDB: (?, ?).

my 'ng serve' can run if i try to add back '@Injectable()' command.
what should i do to solved this 'ng build --prod' problem?

[arrayman]

i have the same issue after upgrading from angular 2 to 5

ERROR in : Can't resolve all parameters for AngularIndexedDB in G:/desarrollo/indexdb/node_modules/angular2-indexeddb/angular2-indexeddb.ts: (?, ?).

where indexeddb is a new proyect generated with ng new indexeddb
and app.modules.ts has been modified as you can see

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import {AngularIndexedDB} from 'angular2-indexeddb';
import { AppComponent } from './app.component';

@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule
],
providers: [AngularIndexedDB],
bootstrap: [AppComponent]
})
export class AppModule { }

additional info:

Angular CLI: 1.7.4
Node: 8.11.1
OS: win32 x64
Angular: 5.2.10
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router

@angular/cli: 1.7.4
@angular-devkit/build-optimizer: 0.3.2
@angular-devkit/core: 0.3.2
@angular-devkit/schematics: 0.3.2
@ngtools/json-schema: 1.2.0
@ngtools/webpack: 1.10.2
@schematics/angular: 0.3.2
@schematics/package-update: 0.3.2
typescript: 2.5.3
webpack: 3.11.0

[arrayman]

i manage to solve by following this link
https://stackoverflow.com/questions/48748066/angular-5-cant-resolve-all-parameters-for-service