Après chaque modification d'une configuration, il est de bon ton d'executer la commande symfony console debug:config qui va nous signaler une eventuelle erreur dans les fichiers de configuration.
Exemple d'erreur (Format non respecté dans un fichier YAML):
D:\webprojects\api2-test>symfony console debug:config
In FileLoader.php line 166:
The file "D:\webprojects\api2-test\config/packages/sensio_framework_extra.yaml" does not contain valid YAML: Indentation problem at line 5 (near " request: ") in D:\webprojects\api2-
test\config/packages/sensio_framework_extra.yaml (which is loaded in resource "D:\webprojects\api2-test\config/packages/sensio_framework_extra.yaml").
In YamlFileLoader.php line 649:
The file "D:\webprojects\api2-test\config/packages/sensio_framework_extra.yaml" does not contain valid YAML: Indentation problem at line 5 (near " request: ").
In Parser.php line 589:
Indentation problem at line 5 (near " request: ").