Osstatus error -9800
I've been using the app GoodReader normally for a year,but three days ago,when I tried to sync my documents to Dropbox via the function of connecting to the server,it occurs a connecting error.The message box says :"Connection failed with error:This operation could not be completed.(Osstatus error -9800)".
It really troubles me,plz help me!Thanks!
iPad 2 Wi-Fi, iOS 5.0.1