Group operations produce 404 error

Summary

From group main page all actions from Activity to Contribution Analytics are producing 404 error

Steps to reproduce

Go to Groups, select one and select any action like Issues.

https://gitlab.com/groups/biz.alexgroup.heroes/milestones (this one is private)

Expected behavior

Produces list of Issues chained to group.

Actual behavior

Produces error 404

Relevant logs and/or screenshots

None.