Unable to edit/delete empty group I created and still owner, redirects 404

On gitlab.com, logged in via Google, created group lubba-dub-dub and now unable to edit or delete group. I get redirected to 404 page https://gitlab.com/lubba-dub-dub, but if I go there directly, group is still there and mocking me. Help.

Created another group, now can’t remove that one either, 404.

Site is using 8.13.0-rc2-ee c018449

Edit: Has been fixed in 8.13.0-rc3-ee bbc1f2d. I was able to delete my two groups.