Version "Settings" tab does not show up

Steps to reproduce

1. FAS login on "translate.zanata.org" instance with "maintainer" permissions

2. The following URL shows a gray page

https://translate.zanata.org/iteration/view/nethcti-docs/v3/settings?dswid=-8371

Expected

The Settings page is shown. I want to modify Languages for a specific version.

Workaround

Open devtools on Chrome browser, add "is-active" class to LI element corresponding to the Settings panel. The panel is shown and works correctly.