Nicht nur Microsoft "versemmelt" gerne das eine oder andere Update, das schafft auch Apple. So beim jüngst veröffentlichten iOS Update 9.3.2
http://www.notebookcheck.com/iPad-Pro-Update-auf-iOS-9-3-2-kann-boese-enden.165567.0.html
Hey good news, i found a webpage from which i get rid out of this type of error issue yesterday, now you can also check this once for getting rid of it completely: www.techinpost.com/there-was-a-problem-downloading-the-software-for-the-iphone/ (http://www.techinpost.com/there-was-a-problem-downloading-the-software-for-the-iphone/)