Thanks @psychobunny .
Hope you might have noticed, external link open in same window.
Hm, update your
config.json to remove the port number.
Installation v0.8.x have this problem
It seems to be a mistake v0.8.x ！！！
You're on the v0.8.x branch and see your version reported as 0.7.3?
0.7.x - User can access site without port.
0.8.x with same config, user has to enter :4567 to access site.