RNFirebase core module was not found natively on iOS - migrating from react-native-firebase v5 to v6

I saw these posts:

Error: RNFirebase core module was not found natively on iOS

RNFirebase core module was not found natively on iOS

RNFirebase core module was not found natively on iOS - Not fixed

Error message - RNFirebase core module was not found natively on iOS

None helped me. I am trying to upgrade from react-native-firebase v 5.6.0 to v6.

I followed the migration guide (https://rnfirebase.io/migrating-to-v6) but somehow my pods are not being installed.

If I add the RNFBApp pod manually like this

pod 'RNFBApp', :path => '../node_modules/@react-native-firebase/app'

Then I get this error

[!] CocoaPods could not find compatible versions for pod "Firebase/CoreOnly":  In snapshot (Podfile.lock):    Firebase/CoreOnly (= 6.3.0)  In Podfile:    RNFBApp (from `../node_modules/@react-native-firebase/app`) was resolved to 8.2.0, which depends on      Firebase/CoreOnly (~> 6.27.0)You have either: * changed the constraints of dependency `Firebase/CoreOnly` inside your development pod `RNFBApp`.   You should run `pod update Firebase/CoreOnly` to apply changes you've made.

Edit:Here is my Podfile:

# Uncomment the next line to define a global platform for your projectplatform :ios, '9.0'use_frameworks!target 'project' do  # Uncomment the next line if you're using Swift or would like to use dynamic frameworks  # use_frameworks!  # Pods for project  # pod 'RNFirebase', :path => '../node_modules/react-native-firebase/ios'  pod 'RNFBApp', :path => '../node_modules/@react-native-firebase/app'  pod 'FBReactNativeSpec', :path => "../node_modules/react-native/Libraries/FBReactNativeSpec"  pod 'RCTRequired', :path => "../node_modules/react-native/Libraries/RCTRequired"  pod 'RCTTypeSafety', :path => "../node_modules/react-native/Libraries/TypeSafety"  pod 'FBLazyVector', :path => "../node_modules/react-native/Libraries/FBLazyVector"  pod 'React', :path => '../node_modules/react-native/'  pod 'React-Core', :path => '../node_modules/react-native/'  pod 'React-CoreModules', :path => '../node_modules/react-native/React/CoreModules'  pod 'React-Core/DevSupport', :path => '../node_modules/react-native/'  pod 'React-RCTActionSheet', :path => '../node_modules/react-native/Libraries/ActionSheetIOS'  pod 'React-RCTAnimation', :path => '../node_modules/react-native/Libraries/NativeAnimation'  pod 'React-RCTBlob', :path => '../node_modules/react-native/Libraries/Blob'  pod 'React-RCTImage', :path => '../node_modules/react-native/Libraries/Image'  pod 'React-RCTLinking', :path => '../node_modules/react-native/Libraries/LinkingIOS'  pod 'React-RCTNetwork', :path => '../node_modules/react-native/Libraries/Network'  pod 'React-RCTSettings', :path => '../node_modules/react-native/Libraries/Settings'  pod 'React-RCTText', :path => '../node_modules/react-native/Libraries/Text'  pod 'React-RCTVibration', :path => '../node_modules/react-native/Libraries/Vibration'  pod 'React-Core/RCTWebSocket', :path => '../node_modules/react-native/'  pod 'React-cxxreact', :path => '../node_modules/react-native/ReactCommon/cxxreact'  pod 'React-jsi', :path => '../node_modules/react-native/ReactCommon/jsi'  pod 'React-jsiexecutor', :path => '../node_modules/react-native/ReactCommon/jsiexecutor'  pod 'React-jsinspector', :path => '../node_modules/react-native/ReactCommon/jsinspector'  pod 'ReactCommon/turbomodule/core', :path => "../node_modules/react-native/ReactCommon"  pod 'Yoga', :path => '../node_modules/react-native/ReactCommon/yoga'  pod 'DoubleConversion', :podspec => '../node_modules/react-native/third-party-podspecs/DoubleConversion.podspec'  pod 'glog', :podspec => '../node_modules/react-native/third-party-podspecs/glog.podspec'  pod 'Folly', :podspec => '../node_modules/react-native/third-party-podspecs/Folly.podspec'  pod 'RNCharts', :path => '../node_modules/react-native-charts-wrapper'  pod 'QBImagePickerController', :path => '../node_modules/react-native-image-crop-picker/ios/QBImagePicker/QBImagePickerController.podspec'# Firebase  pod 'Firebase'#  pod 'Firebase/Core', '~> 6.3.0'#  pod 'Firebase/Analytics'#  pod 'Firebase/DynamicLinks'#  pod 'Firebase/Messaging'# FBSDK#pod 'FBSDKCoreKit'#pod 'FBSDKLoginKit'#pod 'FBSDKShareKit'#RNGestureHandler#RNVectorIcons# React-Native libraries  pod 'Firebase/Core', '~> 6.3.0'  pod 'react-native-fbsdk', :path => '../node_modules/react-native-fbsdk'  pod 'RNGestureHandler', :path => '../node_modules/react-native-gesture-handler'  pod 'RNImageCropPicker', :path => '../node_modules/react-native-image-crop-picker'  pod 'RNVectorIcons', :path => '../node_modules/react-native-vector-icons'  pod 'react-native-splash-screen', :path => '../node_modules/react-native-splash-screen'  pod 'react-native-netinfo', :path => '../node_modules/@react-native-community/netinfo'    pre_install do |installer|        installer.analysis_result.specifications.each do |s|            s.swift_version = '5.0' unless s.swift_version        end    end#post_install do |installer|#  rnfirebase = installer.pods_project.targets.find { |target| target.name == 'RNFirebase' }#  rnfirebase.build_configurations.each do |config|#    config.build_settings['HEADER_SEARCH_PATHS'] = '$(inherited) ${PODS_ROOT}/Headers/Public/**'#  end#endend

If I do react-native run-ios I get this message at the beginning, I think it has something to do with this problem:

error Could not find the following native modules: RNFBApp,RNFBMessaging, RNScreens. Did you forget to run "pod install" ?

If I don't add the RNFBApp pod manually I don't get any error during pod install but when I run the app in the simulator I get RNFirebase core module was not found natively on ios error.

Also, in package.json I see the below react-native-firebase dependencies:

"@react-native-firebase/app": "^8.2.0","@react-native-firebase/messaging": "^7.1.4",

React-native version is 0.61.2 so I am assuming auto-linking should be doing its thing.

I remove Podfile.lock file and Pods folder then I do pod install --repo-update nothing changes.

What could be the problem?

Thanks