Context

When building an iOS app with Codemagic, the build and export steps may complete successfully, but publishing to App Store Connect fails. The publishing log may show an error such as:

• App Store Connect API returning a 500 Internal Server Error

• Cannot determine the Apple ID from Bundle ID '...' and platform 'IOS'

This typically occurs during the Publishing step when Codemagic attempts to upload the IPA to App Store Connect.

Answer

This error is commonly caused by missing required app icon definitions or missing supported interface orientations in your iOS project configuration. App Store Connect rejects the upload when these required fields are absent. Follow the steps below to resolve the issue:

1. Add supported interface orientations to Info.plist. Open your project's Info.plist file and add the following keys:

   <key>UISupportedInterfaceOrientations</key>
   <array>
       <string>UIInterfaceOrientationPortrait</string>
       <string>UIInterfaceOrientationLandscapeLeft</string>
       <string>UIInterfaceOrientationLandscapeRight</string>
   </array>
   <key>UISupportedInterfaceOrientations~ipad</key>
   <array>
       <string>UIInterfaceOrientationPortrait</string>
       <string>UIInterfaceOrientationPortraitUpsideDown</string>
       <string>UIInterfaceOrientationLandscapeLeft</string>
       <string>UIInterfaceOrientationLandscapeRight</string>
   </array>

2. Add the CFBundleIconName key to Info.plist to link the bundle to your asset catalog icon set:

   <key>CFBundleIconName</key>
   <string>AppIcon</string>

3. Add the required app icon PNG files to your asset catalog. Navigate to Assets.xcassets/AppIcon.appiconset/ and ensure valid PNG images are assigned for all required sizes:

   • iPhone: 120×120 pixels

   • iPad: 152×152 pixels

   • App Store: 1024×1024 pixels

4. Commit your changes and re-trigger the build in Codemagic.

After completing these steps, Codemagic should be able to successfully publish your app to App Store Connect.