Forum Xamarin Xamarin.iOS

Cannot sign iOS app after refreshing iOS Certificate


I had to redo my iOS distribution certificate. After I did this and building my xamarin froms/iOS app with msbuild I get:

"<project-file>" (Rebuild target) (1) ->
(_CodesignAppBundle target) -> 
  bin/iPhone/AppStore/ : error : <app-file>: unknown error -1=ffffffffffffffff [<project-file>]

What could this be? How can I fix this?


  • DannyCDannyC US ✭✭✭✭

    When I change a certificate I then launch Xcode and the navigate to Xcode > Preferences and when the Accounts dialog appears, select your Apple ID then under the Team section select the desited Team then tap "Download Manual Profiles". This download and update your certs. You can then rebuild your app and should be good to go. If you have issues make sure you have your Project's iOS Bundle Signing setup properly. Hope this helps

  • RudolfVonKrugsteinRudolfVonKrugstein DEMember ✭✭
    Hey, thanks for your reply. I did what you said, but unfortunately the error remains
  • DannyCDannyC US ✭✭✭✭

    What error displays if you build from Visual Studio?

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