YogaKit.modulemap not found after running the IOS Simulator

According to the comments in this issue, the problem could be that you opened up .xcodeproj instead of .xcworkspace. Some of the other suggested fixes include:

1. Make sure your cocoapods build target is the same version as your projects build target. link
2. Try rebooting your machine. link
3. Examine your podfile to make sure your build scheme is included in it. link

I was experiencing a similar issue when trying to build the project from the command line and the root issue was that I was using the .xcodeproj instead of .xcworkspace. From what I could tell this error could be caused by multiple different factors.

If you are using M1 chip

1. Add arm64 in Excluded Architecture

2. Add following lines in podfile

3. Remove node_modules from root, Podfile.lock and Pods from ios folder

4. Run in root terminal yarn install && cd ios && pod install && pod update

5. Clean your project and open again

6. Wait for indexing the project

7. Run project

Add this to your Podfile if you are using a M1 chip Mac

    installer.pods_project.build_configurations.each do |config|
      config.build_settings["EXCLUDED_ARCHS[sdk=iphonesimulator*]"] = "arm64"
    end

Described solution will work 100% on Apple silicon and while running Xcode without rosetta.

Please try necessary steps only but if still not work than Please try everything including necessary and unnecessary steps.

1 - Not important(Package.json)

"dependencies": {
 "react": "17.0.1",
 "react-native": "0.64.2"
}

2 - necessary

  use_flipper!()
  post_install do |installer|
    react_native_post_install(installer)
        installer.pods_project.build_configurations.each do |config| config.build_settings["EXCLUDED_ARCHS[sdk=iphonesimulator*]"] =  "arm64"
        end
  end

OR

  use_flipper!()

  post_install do |installer|
    react_native_post_install(installer)
      installer.pods_project.targets.each do |target|
          target.build_configurations.each do |config|
            config.build_settings["ONLY_ACTIVE_ARCH"] = "NO"
          end
      end
  end

3 - Add arm64 under Architectures->Excluded Architectures

4 - Add a swift file under your project, can be empty, can be BridgingFile.swift(nothing special in it), this will trigger a bridging header. Wallah, here you go.

The issue I was facing when I received this error was, I had opened the wrong file in Xcode. Instead of opening the '.xcworkspace' file, I opened the '.xcodeproj' file.

The solution to this issue is to open the '.xcworkspace' file in Xcode instead of the '.xcodeproj' file.

I have solved this problem with adding to Debug Any iOS Simulator SDK with value arm64 to excluded architecture in Pods project (apple MacBook Pro m1)

The issue for me was not setting the VALID_ARCHS = "arm64 arm64e armv7 armv7s x86_64"; like this in xyzApp/ios/xyzApp.xcodeproj/project.pbxproj

try running the project on on terminal with this command: npx react-native run-ios and the run it on Xcode again

I have searched a lot and almost wasted my day but in the end, I have tried two solutions that solved my problem

1. Update the Xcode to the latest version
2. Open xxx.xcworkspace instead of xxx.xcodeproj in Xcode
3. Clean and build the project

Hope your problem solve :)

• run brew uninstall watchman
• run brew install watchman or arch arm64 brew install watchman if you are on an M1
• closed the current terminal (console) session
• open it again and go to the project directory
• cd ios && rm -rf Pods Podfile.lock && pod install --repo-update
• run watchman watch-del-all
• if you have the iOS simulator opened, closed it
• run yarn react-native run-los

in my case, this is solved by changing build active architecture only > release > yes in build settings

make sure to your deployment target should be same in podfile, project and target.

Once of reason can export this error is setting on User-Defined. Recently, I pull a project to continue dev. I can't build it on simulator. It's always so this error.

Module map not found

for all lib. Its take me a lot of times to fix this. I check of all config & found problem is previous dev set VALID_ARCHS are only: arm64e armv7s arm64

I changed it to both ios device & simulator: arm64 arm64e armv7 armv7s x86_64 or simple delete VALID_ARCHS from User-Defined.

Now it can work. Hope this help :-)

open xxx.xcworkspace instead of xxx. xcodeproj