我在 xcode 12.4 上遇到了这个问题。它在 xcode 11.7 上运行良好。但是每当我尝试运行该应用程序时，我都会得到这个。经过一番挖掘，我尝试了以下步骤：
Keychain Access -> Right-click on login -> Lock & unlock again -> Clean Xcode project ->Make build again
Deleting the derived data
Clean project and building again.
$ sudo gem install cocoapods-deintegrate cocoapods-clean
$ pod deintegrate
$ pod clean
$ pod install
他们都没有为我工作。这些是我得到的日志：
PhaseScriptExecution [CP]\ Embed\ Pods\ Frameworks
/Users/user/Library/Developer/Xcode/DerivedData/ProjectName-
bnpxrpubbxscksgeymdgjgnkfkdn/Build/Intermediates.noindex/ProjectName.build/Debug-
iphoneos/ProjectName.build/Script-2BDF9C2F03A1FC8AEBC5CB12.sh (in target 'ProjectName' from project
'ProjectName')
cd /Users/user/Desktop/ABC\ Projects/ProjectName\ iPad
/bin/sh -c /Users/user/Library/Developer/Xcode/DerivedData/ProjectName-
bnpxrpubbxscksgeymdgjgnkfkdn/Build/Intermediates.noindex/ProjectName.build/Debug-
iphoneos/ProjectName.build/Script-2BDF9C2F03A1FC8AEBC5CB12.sh
mkdir -p /Users/user/Library/Developer/Xcode/DerivedData/ProjectName-
bnpxrpubbxscksgeymdgjgnkfkdn/Build/Products/Debug-iphoneos/XYZ.app/Frameworks
rsync --delete -av --filter P .*.?????? --links --filter "- CVS/" --filter "- .svn/" --filter "-
.git/" --filter "- .hg/" --filter "- Headers" --filter "- PrivateHeaders" --filter "- Modules"
"/Users/user/Library/Developer/Xcode/DerivedData/ProjectName-
bnpxrpubbxscksgeymdgjgnkfkdn/Build/Products/Debug-iphoneos/CryptoSwift/CryptoSwift.framework"
"/Users/user/Library/Developer/Xcode/DerivedData/ProjectName-
bnpxrpubbxscksgeymdgjgnkfkdn/Build/Products/Debug-iphoneos/XYZ.app/Frameworks"
building file list ... done
CryptoSwift.framework/
CryptoSwift.framework/CryptoSwift
CryptoSwift.framework/Info.plist
sent 774630 bytes received 70 bytes 1549400.00 bytes/sec
total size is 774294 speedup is 1.00
/Users/user/Desktop/ABC Projects/ProjectName iPad/Pods/Target Support Files/Pods-ProjectName/Pods-
ProjectName-frameworks.sh: line 131: ARCHS[@]: unbound variable
Command PhaseScriptExecution failed with a nonzero exit code
这些是我正在使用的豆荚：
pod 'p2.OAuth2', '~> 3.0.0'
pod 'SwiftyJSON', '~> 3.0.0'
pod 'CryptoSwift', '0.8.3'