I believe one thing that cause it is changing a repo from private to public without unchecking Pipelines permission (enabled by default). The new GitLab profile pages looks absolutely gorgeous, but I suspect many will be turned off by the highly visible 'build: failed' icons next to the repos, even if those repos contain nothing but a JSON file.. I personally had to resort to deleting the repo and creating a new one to get rid of it. And on that note, clicking on the '/users/username/projects?limit=10&page=2' next button results in the Overview tab turning blank.