I created a new controller with a new route. I dump generate my new fos_js-routes.json with this command : php bin/console fos:js-routing:dump My new json was
iml
nsopenpanel
fluid-styled-content
chromecast
local
systemtime
maxlength
hover-state
exec-maven-plugin
iab
react-native-contacts
project-online
apache-commons-beanutils
nslayoutanchor
change-detector-ref
natural-key
massivejs
reassign
rasa
sonicwall
non-public-selectors
xemacs
android-multiple-apk
row-constructor
recorder
transform-stream
serverxmlhttp
moniker
windowsiot
jsbundling-rails