On Debian doesnt function url

Good afternoon,

I installed GitLab exactly via https://about.gitlab.com/downloads/#debian8. But after install I cant open it in browser windows. I set up subdomain (of course also domain), but still nothing. Server only tell, that “It works!” - it is same if I dont set up other website in ISP Config.

I used on server ISP Config.

Thank you for some help.