CollectionFS/Meteor-CollectionFS Erreur interne du serveur

when i want to access to the file in the server by its url (server:port/cfs/files/images/xDquBPxNAQ6Nni44X/IMG_06102017_132246_0.png) i got “Erreur interne du serveur”

in the dev mode it works but this error i see after build and execute the project with the PM2