Unable to setup : stuck on setting up button....

[jackflyer]

Running from intellij Idea, on localhost:8080 home page loaded nicely. Added site name database detail(connected successfully). click on setup, stuck with ajax (post request /install sent successfully).
No error in intellij console. Just a warning Cannot authenticate mail server successfully, since it's optional I skipped it. Is it mandatory now?, or something else I missed?

[haiphucnguyen]

Sorry for late reply, github doesn't send the notification. Could you open the browser console and give the log message there?