Impossible to do review after a logon on https://codereview.qt-project.org

After logon on https://codereview.qt-project.org/#/, and trying to "enter"
on any commit to "expand" it, I got a following error:

"
Working...

Code Review - Error
Server Unavailable
0
"

But if try to do same without a logon, then I can view content of any patch,
to see any comments, and so on.