Q: Ihre Anfrage konnte nicht abgeschlossen werden.  Im App Store ist ein Fehler aufgetreten. Bitte versuchen Sie es zu einem späteren Zeitpunkt erneut.

Hello FRRRIDA,

After reviewing your post, It sounds like you are trying to connect to the store to update some apps, but it is not letting you. I would recommend you read this article, it may be able to help troubleshoot the issue. 

If you can’t connect to the iTunes Store - Apple Support

If you can't connect to the iTunes Store on your computer, a software conflict or your Internet service provider (ISP) might be blocking your access. The steps below might help you fix the issue.

Mac

• Make sure that you have the latest versions of iTunes and Safari.
• If you have a firewall, your settings might prevent you from connecting to the iTunes Store. Learn how to configure your firewall.
• Connection issues are occasionally caused by keychain issues. Use Keychain First Aid to reset your keychain.
• If you see a specific error message, get more help with fixing the issue.

If there's still an issue after you try the steps above, contact your Internet service provider and confirm that these ports and servers are turned on for your network.

Thank you for using Apple Support Communities. 
Have a nice day.