I looked through multiple of my repositories, and spoke to an acquaintance about this, they had the same problem. When I click on the insights tab of the repository, and within insights, I click on "Contributors", "Commits", or "Code Frequency", none of them finish loading. I'm stuck on a loading screen, and I tried it last night, I was stuck for 20 minutes and it didn't even finish loading. I just gave up and closed it.
Is there a server issue? A bug? I don't know, but just thought I would alert people on this problem that I've been having, and an acquaintance has had it too.
Do you have a repo that you can share where this happens? If you do, we can take a deeper look. If it is a private repository, you can contact private support at https://github.com/contact and they can investigate.
Let us know.