What version are you running?
4.0.4
What's the URL of the page containing the problem?
https://codereviews.companyname.com/r/141500/
What steps will reproduce the problem?

Open a review that shows no open issues in the review summery panel
Click where it says "There are no open issues"


What is the expected output? What do you see instead?
Expected output: nothing happens

What actually happens: The page is sent to https://codereviews.companyname.com/r/141500/undefined and shows "The page you were looking for does not exist"
What operating system are you using? What browser?
MacOS, Chrome
Please provide any additional information below.