Here is a screenshot from prosilver – when you compare with ForumUS screenshot you see there is mchat box missing and also active links/topic is missing (but that is not officially supported by the theme AFAIR).
Please ignore the translation key part, seems to be an issue on mChat side in new version (confirmed by selecting different style). The missing box is specific to ForumUS, if you could check that one
Check the screenshot. The mChat chat box is not visible (it is a feature of mchat to show the box on main page at the top) and menu contains translation keys.
