Wrong link in board sidebar's Assignee

Summary

Clicking on Assignee in sidebar of borads goes to wrong destination.

Steps to reproduce

  1. Go to boards
  2. Click on any assigned issue (will open sidebar)
  3. Click on Assignee
  4. BANG

What is the current bug behavior?

gitlab.com is present twice in the link URL.

What is the expected correct behavior?

The correct link

Relevant logs and/or screenshots

a

b

Output of checks

This bug happens on GitLab.com