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/commits/commit/42cf230d1fe36981cb13f6709793fe395c2f1451/public/admin/plugins/flag-icon-css/flags/1x1/tn.svg
You should set ROOT_URL correctly, otherwise the web may not work correctly.