The API endpoints did not work

xx/xx/xx/qtumcore-node start
and the qtumd is working, qtum-cli is ok, but insignt-api has nothing to response when i curl the api endpoints "http://127.0.0.1:3001/qtum-insight-api/xxx"

when i test the port 3001 by lsof -i:3001 , it is nothing to come out.

i'm the first time to start qtumcore-node .