Wolkenfeld review for ACF: Metafields Custom Fields

Is the Tool currently offline? I can't get access to the dashboard, I get the following error message: "app.advancedcustomfield.com refused to connect." The app was working well until 2 days ago when it stopped working. We build our whole store with it so we can't access any of our functionality to change, adjust etc. Pretty bad timing as there are a couple of sales ahead starting tomorrow :/