Penbook funktioniert nicht

Upgrade to diese App Premium to create and export unlimited notebooks, receive access to new stationery and covers as they're designed, and get regular app updates. diese App Premium is available by purchasing a yearly subscription or a one-time (lifetime) in-app purchase.  When you choose to upgrade with the yearly subscription, you can start using diese App Premium for free with a 7-day free trial.  Then, use the best digital inking technology to pour your ideas, notes, plans, and dreams into it. diese App's Live Paper is way smarter than ordinary stationery.  Give your notebooks colorful covers with fun art, and share them so your notes are always where you need them. diese App has a huge selection of customizable stationery.  Use all of diese App's stationery and writing features in a single notebook for free for as long as you like.  If you do not cancel, you will be automatically billed for the yearly subscription when your free trial ends.  Schedule your life on a monthly planner that shows a real calendar, organize your day with a day planner that shows you what time it is, and record your nutrition on a food diary that knows what day it is.  During the trial, cancel any time until 24 hours before the trial expires, and you will not be charged.  Write naturally with your Apple Pencil on Live Paper with diese App.  Your account will be charged for renewal within 24 hours prior to the end of the current period.  You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase.  Build your perfect notebook from more than four hundred types of stationery.  Import your PDFs into diese App for quick annotation and editing.  Payment will be charged to your Apple ID account at the confirmation of purchase.  Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period.  Or, bring your own stationery!