How to Fix CocoaPods Podspec Errors in Flutter iOS

How I Encounter This Issue

I cloned a project from GitHub and tried to run it on my laptop. When I was about to run the app on the iOS Simulator, I encountered the error message below.

Error Message


Launching lib/main.dart on iPhone 13 Pro in debug mode...
CocoaPods' output:
↳
      Preparing

    Analyzing dependencies

    Inspecting targets to integrate
      Using `ARCHS` setting to build architectures of target `Pods-Runner`: (``)
      Using `ARCHS` setting to build architectures of target `Pods-RunnerTests`: (``)

    Fetching external sources
    -> Fetching podspec for `Flutter` from `Flutter`
    -> Fetching podspec for `app_links` from `.symlinks/plugins/app_links/ios`
    -> Fetching podspec for `desktop_webview_auth` from `.symlinks/plugins/desktop_webview_auth/ios`
    -> Fetching podspec for `firebase_auth` from `.symlinks/plugins/firebase_auth/ios`
    firebase_auth: Using Firebase SDK version '11.10.0' defined in 'firebase_core'
    -> Fetching podspec for `firebase_core` from `.symlinks/plugins/firebase_core/ios`
    firebase_core: Using Firebase SDK version '11.10.0' defined in 'firebase_core'
    -> Fetching podspec for `firebase_dynamic_links` from `.symlinks/plugins/firebase_dynamic_links/ios`
    firebase_dynamic_links: Using Firebase SDK version '11.10.0' defined in 'firebase_core'
    -> Fetching podspec for `google_sign_in_ios` from `.symlinks/plugins/google_sign_in_ios/darwin`
    -> Fetching podspec for `path_provider_foundation` from `.symlinks/plugins/path_provider_foundation/darwin`
    -> Fetching podspec for `share_plus` from `.symlinks/plugins/share_plus/ios`
    -> Fetching podspec for `shared_preferences_foundation` from `.symlinks/plugins/shared_preferences_foundation/darwin`
    -> Fetching podspec for `url_launcher_ios` from `.symlinks/plugins/url_launcher_ios/ios`

    Resolving dependencies of `Podfile`
      CDN: trunk Relative path: CocoaPods-version.yml exists! Returning local because checking is only performed in repo update
      CDN: trunk Relative path: all_pods_versions_0_3_5.txt exists! Returning local because checking is only performed in repo update
      CDN: trunk Relative path: Specs/0/3/5/Firebase/11.14.0/Firebase.podspec.json exists! Returning local because checking is only performed in repo update
2
      CDN: trunk Relative path: Specs/0/3/5/Firebase/11.10.0/Firebase.podspec.json exists! Returning local because checking is only performed in repo update
      CDN: trunk Relative path: all_pods_versions_b_b_9.txt exists! Returning local because checking is only performed in repo update
      CDN: trunk Relative path: Specs/b/b/9/AppAuth/2.0.0/AppAuth.podspec.json exists! Returning local because checking is only performed in repo update
      CDN: trunk Relative path: all_pods_versions_c_e_3.txt exists! Returning local because checking is only performed in repo update
      CDN: trunk Relative path: Specs/c/e/3/GTMSessionFetcher/4.5.0/GTMSessionFetcher.podspec.json exists! Returning local because checking is only performed in repo update
      CDN: trunk Relative path: all_pods_versions_d_4_0.txt exists! Returning local because checking is only performed in repo update
      CDN: trunk Redirecting from https://cdn.cocoapods.org/Specs/d/4/0/GoogleSignIn/8.1.0-vwg-eap-1.0.0/GoogleSignIn.podspec.json to https://cdn.jsdelivr.net/cocoa/Specs/d/4/0/GoogleSignIn/8.1.0-vwg-eap-1.0.0/GoogleSignIn.podspec.json
      CDN: trunk Redirecting from https://cdn.cocoapods.org/Specs/d/4/0/GoogleSignIn/8.1.0-vwg-eap-1.1.0/GoogleSignIn.podspec.json to https://cdn.jsdelivr.net/cocoa/Specs/d/4/0/GoogleSignIn/8.1.0-vwg-eap-1.1.0/GoogleSignIn.podspec.json
      CDN: trunk Relative path couldn't be downloaded: Specs/d/4/0/GoogleSignIn/8.1.0-vwg-eap-1.1.0/GoogleSignIn.podspec.json Response: 404
      CDN: trunk Relative path couldn't be downloaded: Specs/d/4/0/GoogleSignIn/8.1.0-vwg-eap-1.0.0/GoogleSignIn.podspec.json Response: 404
      CDN: trunk Redirecting from https://cdn.cocoapods.org/Specs/d/4/0/GoogleSignIn/8.1.0-vwg-eap-1.1.0/GoogleSignIn.podspec.json to https://cdn.jsdelivr.net/cocoa/Specs/d/4/0/GoogleSignIn/8.1.0-vwg-eap-1.1.0/GoogleSignIn.podspec.json
      CDN: trunk Relative path couldn't be downloaded: Specs/d/4/0/GoogleSignIn/8.1.0-vwg-eap-1.1.0/GoogleSignIn.podspec.json Response: 404
    [!] No podspec exists at path `/Users/username/.cocoapods/repos/trunk/Specs/d/4/0/GoogleSignIn/8.1.0-vwg-eap-1.1.0/GoogleSignIn.podspec.json`.
    
    ...

Error running pod install
Error launching application on iPhone 13 Pro.

This usually happens when the CocoaPods cache is corrupted or the pod specifications are outdated.

Solution

Here are the steps that solved it for me.

Try them in order, and stop once your build works again.

Clean CocoaPods cache and reinstall:


cd ios
rm -rf Pods Podfile.lock
pod cache clean --all
pod repo update
pod install

If still failing, try deintegrating and reinstalling:


cd ios
pod deintegrate
pod install

As a last resort, remove the entire CocoaPods cache:


rm -rf ~/.cocoapods/repos/trunk
pod setup
cd ios
pod install