reinstalled all contribs with composer

need to run :
drush ev 'drupal_flush_all_caches();'
drush cr
and restart nginx and php-fpm before loading the website

web/modules/custom/edlp_studio/edlp_studio.links.action.yml

@@ -0,0 +1,10 @@
+entity.chutier.add_form:
+  route_name: entity.chutier.add_form
+  title: 'Add Chutier'
+  appears_on:
+    - entity.chutier.collection
+entity.composition.add_form:
+  route_name: entity.composition.add_form
+  title: 'Add Composition'
+  appears_on:
+    - entity.composition.collection