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In my current project, previews barely work. Most of the time, the following error is displayed on top: Cannot preview in this file -- Unexpected error occurred Sometimes, refreshing works by clicking the Try Again button, but usually that takes multiple tries. When I click the Diagnostics button, the following error is shown: HumanReadableSwiftError ConfigurationError: noPreviewInfos(arch: "x86_64", sdkRoot: "/Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator14.2.sdk") This happens both in Xcode 12 and the beta Xcode 12.2. Who has a solution for this?

I've got a framework project with mixed Objective-C and Swift code. When archiving this project with Xcode 11 beta 4, I'm getting multiple errors that start with "Could not find or use auto-linked library". The full error stack is:Ld /Users/bartvk/Library/Developer/Xcode/DerivedData/Connect-bofdyopfqudfrrfrdzcxywnzzqvt/Build/Intermediates.noindex/ArchiveIntermediates/Connect/IntermediateBuildFilesPath/Connect.build/Release-iphoneos/Connect.build/Objects-normal/armv7/Binary/Connect normal armv7 (in target 'Connect' from project 'Connect') cd /Users/bartvk/Projects/Connect /Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -target armv7-apple-ios9.3 -dynamiclib -isysroot /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS13.0.sdk -L/Users/bartvk/Library/Developer/Xcode/DerivedData/Connect-bofdyopfqudfrrfrdzcxywnzzqvt/Build/Intermediates.noindex/ArchiveIntermediates/Connect/BuildProductsPath/Release-iphoneos -F/Users/bartvk/Library/Developer/Xcode/DerivedData/Connect-bofdyopfqudfrrfrdzcxywnzzqvt/Build/Intermediates.noindex/ArchiveIntermediates/Connect/BuildProductsPath/Release-iphoneos -filelist /Users/bartvk/Library/Developer/Xcode/DerivedData/Connect-bofdyopfqudfrrfrdzcxywnzzqvt/Build/Intermediates.noindex/ArchiveIntermediates/Connect/IntermediateBuildFilesPath/Connect.build/Release-iphoneos/Connect.build/Objects-normal/armv7/Connect.LinkFileList -install_name @rpath/Connect.framework/Connect -Xlinker -rpath -Xlinker /usr/lib/swift -Xlinker -rpath -Xlinker @executable_path/Frameworks -Xlinker -rpath -Xlinker @loader_path/Frameworks -dead_strip -Xlinker -object_path_lto -Xlinker /Users/bartvk/Library/Developer/Xcode/DerivedData/Connect-bofdyopfqudfrrfrdzcxywnzzqvt/Build/Intermediates.noindex/ArchiveIntermediates/Connect/IntermediateBuildFilesPath/Connect.build/Release-iphoneos/Connect.build/Objects-normal/armv7/Connect_lto.o -fembed-bitcode -Xlinker -bitcode_verify -Xlinker -bitcode_hide_symbols -Xlinker -bitcode_symbol_map -Xlinker /Users/bartvk/Library/Developer/Xcode/DerivedData/Connect-bofdyopfqudfrrfrdzcxywnzzqvt/Build/Intermediates.noindex/ArchiveIntermediates/Connect/BuildProductsPath/Release-iphoneos -fobjc-arc -fobjc-link-runtime -L/Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/iphoneos -L/usr/lib/swift -Xlinker -add_ast_path -Xlinker /Users/bartvk/Library/Developer/Xcode/DerivedData/Connect-bofdyopfqudfrrfrdzcxywnzzqvt/Build/Intermediates.noindex/ArchiveIntermediates/Connect/IntermediateBuildFilesPath/Connect.build/Release-iphoneos/Connect.build/Objects-normal/armv7/Connect.swiftmodule -compatibility_version 1 -current_version 1 -Xlinker -dependency_info -Xlinker /Users/bartvk/Library/Developer/Xcode/DerivedData/Connect-bofdyopfqudfrrfrdzcxywnzzqvt/Build/Intermediates.noindex/ArchiveIntermediates/Connect/IntermediateBuildFilesPath/Connect.build/Release-iphoneos/Connect.build/Objects-normal/armv7/Connect_dependency_info.dat -o /Users/bartvk/Library/Developer/Xcode/DerivedData/Connect-bofdyopfqudfrrfrdzcxywnzzqvt/Build/Intermediates.noindex/ArchiveIntermediates/Connect/IntermediateBuildFilesPath/Connect.build/Release-iphoneos/Connect.build/Objects-normal/armv7/Binary/Connect ld: warning: Could not find or use auto-linked library 'swiftCoreFoundation' ld: warning: Could not find or use auto-linked library 'swiftObjectiveC' ld: warning: Could not find or use auto-linked library 'swiftFoundation' ld: warning: Could not find or use auto-linked library 'swiftsimd' ld: warning: Could not find or use auto-linked library 'swiftMetal' ld: warning: Could not find or use auto-linked library 'swiftDarwin' ld: warning: Could not find or use auto-linked library 'swiftUIKit' ld: warning: Could not find or use auto-linked library 'swiftQuartzCore' ld: warning: Could not find or use auto-linked library 'swiftCore' ld: warning: Could not find or use auto-linked library 'swiftCoreGraphics' ld: warning: Could not find or use auto-linked library 'swiftDispatch' ld: warning: Could not find or use auto-linked library 'swiftAVFoundation' ld: warning: Could not find or use auto-linked library 'swiftCoreMedia' ld: warning: Could not find or use auto-linked library 'swiftCoreImage' ld: warning: Could not find or use auto-linked library 'swiftCoreAudio' Undefined symbols for architecture armv7: "type metadata for Swift.AnyObject", referenced from: generic specialization <__C.UITouch> of Swift.Set.subscript.getter : (Swift.Set.Index) -> A inAnd then about 100 errors follow, that seem to be related to the above. Note that compiling works, it's that archiving doesn't. Under Xcode 10.2.1, archiving is entirely possible. Deleting the DerivedData folder doesn't help. In Build Settings, there's a setting Valid Architectures, and its default value is "arm64 arm64e armv7 armv7s". If I edit this value to only include armv7s, then Xcode can Archive this project.Why is this, and what am I missing if I don't include armv7?