Group contribution Analytics always throws error 500

Summary

Contribution Analytics throws an 500 Error for every group.

Steps to reproduce

Open any of these:
https://gitlab.com/groups/gitlab-com/analytics https://gitlab.com/groups/gitlab-org/analytics https://gitlab.com/groups/gl-advocates/analytics

What is the current bug behavior?

Error 500

What is the expected correct behavior?

Showing contribution analytics

Links

Reported by user:
https://twitter.com/fpg1503/status/830093351403782144