Skillbase funktioniert nicht

Subscriptions: 
If you choose to purchase diese App Pro, payment will be charged to your iTunes account, and your account will be charged for renewal within 24 hours prior to the end of the current period.  Download the diese App app now and sign up for a free 7-day trial. • Do you want to learn special skills that are not part of the diese App app yet?  Please note that any unused portion of a free trial period (if offered) will be forfeited when you purchase a Pro subscription during the free trial period.  diese App helps you become smarter and more successful by listening to key insights of powerful skills that some of the most brilliant minds have in common.  With diese App you can upgrade your enterpreneurial success, become a better employee or in other words, simply push your business skills to the next level.  If you don’t choose to purchase diese App Pro, you can simply continue using diese App without its Pro features.  A 7-day trial of diese App Pro is offered with full access to all features.  No cancellation of the current subscription is allowed during the active subscription period.  Auto-renewal may be turned off at any time by going to your settings in the iTunes Store after purchase.  A period includes all PRO features for 7 days.