How to Fix Missing SwiftSupport?

Flutter iOS App Submission Issue

This is my final update on this issue. While I believe this is the solution, I want to document the approaches I tried — some worked once, but the issue always returned.

If you’ve followed all the steps but still experience an inconsistent issue — where it works sometimes and fails other times — the fix that finally worked for me was using Xcode’s default DerivedData and archive location.

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The previous version was successfully submitted and approved. In the latest update, only the version number and some text were changed. However, submission failed with the error:

“ITMS-90426: Invalid Swift Support — The SwiftSupport folder is missing. Rebuild your app using the current public (GM) version of Xcode and resubmit it.”

Release Steps Followed:

flutter clean  
flutter pub get  
flutter build ios --release  
# In Xcode:
- Clean Build Folder  
- Archive  
- Distribute App

Despite searching online and trying multiple suggested fixes, the issue persists.

Solution:

Rebuild the IPA with “Embed Swift Standard Libraries” Enabled

• Open Xcode → Select your Project.
• Go to Build Settings.
• Search for Always Embed Swift Standard Libraries and set it to YES.

# In terminal:

flutter clean  
rm -rf ios/Pods ios/Podfile.lock

flutter pub get

cd ios
pod install --repo-update
# if you running into issue, need to fix it. 
# [!] CocoaPods did not set the base configuration of your project because your project already has a custom config set. In order for CocoaPods integration to work at all, please either set the base configurations of the target `Runner` to `Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig` or include the `Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig` in your build configuration (`Flutter/Release.xcconfig`).
# I use WARP's ai to add address above issue:how to Include the `Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig` in your build configuration (`Flutter/Release.xcconfig`)

flutter build ios --release  

# In Xcode:
- Clean Build Folder  
- Archive  
- Distribute App 
# see the screen shots at the bottom of this page.

PS: To avoid uploading to the App Store, you can export the archived package locally. During the export process, you’ll have the option to select a destination folder. In that folder, locate the .ipa file, rename it to .zip, and unzip it into a directory. You should then see a folder structure similar to this:

another issue by “pod install — repo-update”:

Solved by: