Hey, @Tomavatars, sorry you’ve run into a problem.
Blokas’ @Giedrius will hopefully pick this up in the working week.
In the meantime, a site Google Search pulled up this topic: Midihub Won't Work and Won't Connect
Although it deals with a different Error number, the advice Giedrius gives there may well apply to your case, so at least you can get ahead of the game in preparation for his real-time help!