9.3 upgrade causes some projects to 404 out

I can see some projects with only a few files on them but after the upgrade loading the project page gets a 404.
i cant even delete and recreate the projects.
https://gitlab.domain.com/admin/projects/mygroup/builds
is fine
but when i go to -
https://gitlab.domain.com/mygroup/builds
i get a 404.

how do i fix this ? i get no errors and ok when i do a gitlab-rake gitlab:check