GitLab Pages suddenly behind login
Description of the problem
For my project, I have a GitLab Pages website set up that was publicly accessible (https://vincenttunru.gitlab.io/tripledoc/). Unfortunately, people are now reporting being redirected to a Sign in page (I can reproduce this in Private Browsing), and those who sign in consequently end up at a 404 page. When I am signed in, I can access the site just fine.
Which Group/Project (with full path) is experiencing the issue?
Approximate date/time when the error occurred.
Since at least 13:00 CEST, October 2nd 2019. However, I did find a similar report from someone posted four days ago.
Describe what you were doing right before the issue occurred.