use providedIn

terminus-plugin-manager/src/index.ts

@@ -22,7 +22,6 @@ import { PluginsSettingsTabProvider } from './settings'
     providers: [
         { provide: SettingsTabProvider, useClass: PluginsSettingsTabProvider, multi: true },
         { provide: ConfigProvider, useClass: PluginsConfigProvider, multi: true },
-        PluginManagerService,
     ],
     entryComponents: [
         PluginsSettingsTabComponent,

terminus-plugin-manager/src/services/pluginManager.service.ts

@@ -23,7 +23,7 @@ export interface IPluginInfo {
     path?: string
 }
 
-@Injectable()
+@Injectable({ providedIn: 'root' })
 export class PluginManagerService {
     logger: Logger
     builtinPluginsPath: string = (window as any).builtinPluginsPath