running npm run client and getting messages

[FernandoBoza]

WARNING Compiled with 1 warnings 5:46:10 AM
warning in ./client/src/stored.js
8:23-44 "export 'STORE_KEY_CONFIG_LANG' was not found in './constants'

[HPM] Error occurred while trying to proxy request /socket.io/?EIO=3&transport=polling&t=Lw4xeFx
[HPM] Client disconnected
[HPM] Upgrading to WebSocket
[HPM] Client disconnected

Mac, Sierra, Node 6.11.0

[erguotou520]

STORE_KEY_CONFIG_LANG will be not defined if you do not choose i18n when prompted.
The socket.io error doesn't show any useful information.
Let me know how do you choose when prompted? What script do you run after init?