wolfshards I am afraid that I can't help you without further details. If you give me time, I am able to look at it in more detail tomorrow. Right now, I do not have the time, sorry.
EndoThePro it's related to your forum not being rsynced (see this). If you tell me your forum name, I can sync it for you sooner (you may also do so by fixing up your forum at FreeFlarum's settings), which will fix the translations (widgets, in your case).
It seems that many forums (especially new ones) are out of sync since we moved to a different server. I have tried to clear the cache of our master forum to see if it could help. I am syncing all forums right now. If that won't make the error disappear, I will investigate what causes the issue tomorrow (maybe forums haven't been properly linked when we moved them, or perhaps we missed something else)