N'injecte pas AbstractAPIService.

Le tag @Injectable n'est pas hérité mais pris en compte immédiatement.

src/Resources/views/common.ts.twig

@@ -2,7 +2,6 @@
 
 {% block content %}
 import { HttpClient, HttpResponseBase } from '@angular/common/http';
-import { Injectable } from '@angular/core';
 import { forkJoin, Observable } from 'rxjs';
 
 /**
@@ -339,7 +338,6 @@ export interface APIService<API extends APIMeta> {
 /**
  * Implémentation de base d'une api
  */
-@Injectable()
 export abstract class AbstractAPIService<
   API extends APIMeta,
   MR extends APIMetadataRegistry<API>,

src/Resources/views/metadata.ts.twig

@@ -124,7 +124,16 @@ export class AppRepositories implements APIRepositoryRegistry<AppAPI> {
  * Le service d'API
  */
 @Injectable()
-export class AppAPIService extends AbstractAPIService<AppAPI, AppMetadata, AppRepositories> {}
+export class AppAPIService extends AbstractAPIService<AppAPI, AppMetadata, AppRepositories> {
+  public constructor(
+    metadata: AppMetadata,
+    repositories: AppRepositories,
+    cache: AbstractResourceCache,
+    client: HttpClient
+  ) {
+    super(metadata, repositories, cache, client);
+  }
+}
 
 /* Provider factories */
 {% for repo in repositories %}