I tried cleaning the node_modules folder, to no effect. I don't know what to do. It's just stuck. It doesn't display any error message, or any indication of what's wrong. It's actually kind of impressive just how unhelpful it is. I'm so sick of xcode wasting my time, seriously...

I created another target for my app. This new target needs to show a different splash screen as the others. So I duplicated the LaunchScreen.storyboard file and renamed it to LaunchScreenNew.storyboard. Then in the newTargetinfo.plist file, I replaced the value for Launch Screen File from LaunchScreen to LaunchScreenNew. But now, only a black screen is showing on my app, and I haven't found a single piece of documentation whatsoever on how to do this.

I don't know why, but every time I try to build, I get these "duplicate symbols for architecture x86_64" errors. They have nothing to do with my code, they're just unexplained obstacles that hinder my productivity and waste my time for no reason whatsoever... And to be honest I'm just tired of wasting my time trying to fix them. So if there's anyone out there who knows how to fix this, thanks in advance. duplicate symbol '_FBLPromiseRetryDefaultDelayInterval' in: /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise+Retry 2.o) /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise+Retry.o) duplicate symbol '_FBLWaitForPromisesWithTimeout' in: /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise+Testing 2.o) /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise+Testing.o) duplicate symbol '_OBJC_IVAR_$_FBLPromise._pendingObjects' in: /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise 2.o) /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise.o) duplicate symbol '_OBJC_IVAR_$_FBLPromise._observers' in: /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise 2.o) /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise.o) duplicate symbol '_OBJC_IVAR_$_FBLPromise._error' in: /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise 2.o) /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise.o) duplicate symbol '_OBJC_IVAR_$_FBLPromise._value' in: /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise 2.o) /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise.o) duplicate symbol '_OBJC_IVAR_$_FBLPromise._state' in: /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise 2.o) /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise.o) duplicate symbol '_OBJC_CLASS_$_FBLPromise' in: /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise 2.o) /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise.o) duplicate symbol '_OBJC_METACLASS_$_FBLPromise' in: /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise 2.o) /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/PromisesObjC/libPromisesObjC.a(FBLPromise.o) ld: 29 duplicate symbols for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) /Users/mike-h/Documents/dev/lbcfidelmobile/ios/Pods/Pods.xcodeproj: warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.5.99. (in target 'Flipper-DoubleConversion' from project 'Pods') /Users/mike-h/Documents/dev/lbcfidelmobile/ios/Pods/Pods.xcodeproj: warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.5.99. (in target 'Flipper-Glog' from project 'Pods') /Users/mike-h/Documents/dev/lbcfidelmobile/ios/Pods/Pods.xcodeproj: warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.5.99. (in target 'boost-for-react-native' from project 'Pods') /Users/mike-h/Documents/dev/lbcfidelmobile/ios/Pods/Pods.xcodeproj: warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.4, but the range of supported deployment target versions is 9.0 to 14.5.99. (in target 'Flipper-PeerTalk' from project 'Pods') objc[24816]: Class AMSupportURLConnectionDelegate is implemented in both /usr/lib/libauthinstall.dylib (0x1f1a26c10) and /System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice (0x1143082c8). One of the two will be used. Which one is undefined. objc[24816]: Class AMSupportURLSession is implemented in both /usr/lib/libauthinstall.dylib (0x1f1a26c60) and /System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice (0x114308318). One of the two will be used. Which one is undefined. ** BUILD FAILED ** The following build commands failed: Ld /Users/mike-h/Library/Developer/Xcode/DerivedData/lbcfidelmobile-bnxskcnuyolvodbrlgoqclkwrtka/Build/Products/Debug-iphonesimulator/lbcfidelmobile.app/lbcfidelmobile normal (1 failure) info Run CLI with --verbose flag for more details. error Command failed with exit code 1. info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command. The terminal process "zsh '-c', 'yarn run ios'" terminated with exit code: 1.