Your ROOT_URL in app.ini is http://159.89.207.79:3000/ but you are visiting http://9.cron.my.id:3000/tribikram/ET-VISA/src/commit/338d01506954d68a4c4156d867d0c72d9ca3465c/public/admin/plugins/flag-icon-css/flags
You should set ROOT_URL correctly, otherwise the web may not work correctly.
Mahesh Sharma