Recently (last 2 days), my Unite apps stopped working with Hookmark.
Welcome to Hookmark forum, @maxlinworm .
I just tried it and it seems to work fine.
But I found if I have Alfred running, then it would not work. That’s because Hookmark use keyboard “shift+command+c” to get the URL, and Alfred seems to have control of that shortcut. Some other apps might do the same thing.