Use Twig instead of templating

app/config/config.yml

@@ -23,8 +23,6 @@ framework:
     csrf_protection: ~
     validation:
         enable_annotations: true
-    templating:
-        engines: ['twig']
     default_locale: "%locale%"
     trusted_hosts: ~
     session:
@@ -43,7 +41,6 @@ twig:
     strict_variables: "%kernel.debug%"
     form_themes:
         - "@LexikFormFilter/Form/form_div_layout.html.twig"
-    exception_controller: Wallabag\CoreBundle\Controller\ExceptionController:showAction
     globals:
         registration_enabled: '%fosuser_registration%'
 
@@ -87,8 +84,13 @@ doctrine_migrations:
             executed_at_column_name: 'executed_at'
 
 fos_rest:
+    zone:
+        - { path: ^/api }
+        - { path: ^/annotations }
     param_fetcher_listener: true
     body_listener: true
+    exception:
+        serializer_error_renderer: true
     view:
         mime_types:
             csv:
@@ -117,9 +119,6 @@ fos_rest:
             - { path: "^/api/entries/([0-9]+)/export.(.*)", priorities: ['epub', 'mobi', 'pdf', 'txt', 'csv'], fallback_format: json, prefer_extension: false }
             - { path: "^/api", priorities: ['json', 'xml'], fallback_format: json, prefer_extension: false }
             - { path: "^/annotations", priorities: ['json', 'xml'], fallback_format: json, prefer_extension: false }
-            # for an unknown reason, EACH REQUEST goes to FOS\RestBundle\EventListener\FormatListener
-            # so we need to add custom rule for custom api export but also for all other routes of the application...
-            - { path: '^/', priorities: ['text/html', '*/*'], fallback_format: html, prefer_extension: false }
 
 nelmio_api_doc:
     areas: