WineskinLauncher build error VMMVideoCardManager

[githubuser00]

`bash-5.0$ xcodebuild -workspace Wineskin.xcworkspace -scheme WineskinLauncher build
note: Using new build system
note: Planning build
note: Using build description from disk
warning: Traditional headermap style is no longer supported; please migrate to using separate headermaps and set 'ALWAYS_SEARCH_USER_PATHS' to NO. (in target 'WineskinLauncher' from project 'WineskinLauncher')
CompileC /Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Intermediates.noindex/WineskinLauncher.build/Debug/WineskinLauncher.build/Objects-normal/x86_64/WineskinLauncherAppDelegate.o /Users/user001/Documents/wineskin/WineskinLauncher/WineskinLauncherAppDelegate.m normal x86_64 objective-c com.apple.compilers.llvm.clang.1_0.compiler (in target 'WineskinLauncher' from project 'WineskinLauncher')
cd /Users/user001/Documents/wineskin/WineskinLauncher
export LANG=en_US.US-ASCII
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x objective-c -target x86_64-apple-macos10.6 -fmessage-length=248 -fdiagnostics-show-note-include-stack -fmacro-backtrace-limit=0 -fcolor-diagnostics -std=gnu99 -fobjc-arc -gmodules -Wno-trigraphs -fpascal-strings -O0 -fno-common -Wno-missing-field-initializers -Wno-missing-prototypes -Wunreachable-code -Wno-implicit-atomic-properties -Wno-objc-interface-ivars -Wno-arc-repeated-use-of-weak -Wimplicit-retain-self -Wduplicate-method-match -Wno-missing-braces -Wparentheses -Wswitch -Wunused-function -Wno-unused-label -Wno-unused-parameter -Wunused-variable -Wunused-value -Wempty-body -Wuninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wconstant-conversion -Wint-conversion -Wbool-conversion -Wenum-conversion -Wno-float-conversion -Wnon-literal-null-conversion -Wobjc-literal-conversion -Wshorten-64-to-32 -Wpointer-sign -Wno-newline-eof -Wno-selector -Wno-strict-selector-match -Wundeclared-selector -Wdeprecated-implementations -DOBJC_OLD_DISPATCH_PROTOTYPES=0 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -fasm-blocks -fstrict-aliasing -Wprotocol -Wdeprecated-declarations -g -Wno-sign-conversion -Winfinite-recursion -Wcomma -Wblock-capture-autoreleasing -Wstrict-prototypes -Wno-semicolon-before-method-body -index-store-path /Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Index/DataStore -iquote /Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Intermediates.noindex/WineskinLauncher.build/Debug/WineskinLauncher.build/WineskinLauncher-generated-files.hmap -I/Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Intermediates.noindex/WineskinLauncher.build/Debug/WineskinLauncher.build/WineskinLauncher-own-target-headers.hmap -I/Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Intermediates.noindex/WineskinLauncher.build/Debug/WineskinLauncher.build/WineskinLauncher-all-target-headers.hmap -iquote /Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Intermediates.noindex/WineskinLauncher.build/Debug/WineskinLauncher.build/WineskinLauncher-project-headers.hmap -I/Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Products/Debug/include -I/Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Intermediates.noindex/WineskinLauncher.build/Debug/WineskinLauncher.build/DerivedSources-normal/x86_64 -I/Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Intermediates.noindex/WineskinLauncher.build/Debug/WineskinLauncher.build/DerivedSources/x86_64 -I/Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Intermediates.noindex/WineskinLauncher.build/Debug/WineskinLauncher.build/DerivedSources -F/Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Products/Debug -include /Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Intermediates.noindex/PrecompiledHeaders/SharedPrecompiledHeaders/4028258763941737393/WineskinLauncher_Prefix.pch -MMD -MT dependencies -MF /Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Intermediates.noindex/WineskinLauncher.build/Debug/WineskinLauncher.build/Objects-normal/x86_64/WineskinLauncherAppDelegate.d --serialize-diagnostics /Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Intermediates.noindex/WineskinLauncher.build/Debug/WineskinLauncher.build/Objects-normal/x86_64/WineskinLauncherAppDelegate.dia -c /Users/user001/Documents/wineskin/WineskinLauncher/WineskinLauncherAppDelegate.m -o /Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Intermediates.noindex/WineskinLauncher.build/Debug/WineskinLauncher.build/Objects-normal/x86_64/WineskinLauncherAppDelegate.o
/Users/user001/Documents/wineskin/WineskinLauncher/WineskinLauncherAppDelegate.m:1085:25: error: use of undeclared identifier 'VMMVideoCardManager'; did you mean 'VMMVideoCardNameKey'?
VMMVideoCard* vc = [VMMVideoCardManager bestInternalVideoCard];
^~~~~~~~~~~~~~~~~~~
VMMVideoCardNameKey
In file included from /Users/user001/Documents/wineskin/WineskinLauncher/WineskinLauncherAppDelegate.m:11:
In file included from /Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Products/Debug/ObjectiveC_Extension.framework/Headers/ObjectiveC_Extension.h:59:
In file included from /Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Products/Debug/ObjectiveC_Extension.framework/Headers/VMMComputerInformation.h:188:
/Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Products/Debug/ObjectiveC_Extension.framework/Headers/VMMVideoCard.h:17:34: note: 'VMMVideoCardNameKey' declared here
static NSString * _Nonnull const VMMVideoCardNameKey = @"sppci_model";
^
/Users/user001/Documents/wineskin/WineskinLauncher/WineskinLauncherAppDelegate.m:1085:45: error: no visible @interface for 'NSString' declares the selector 'bestInternalVideoCard'
VMMVideoCard* vc = [VMMVideoCardManager bestInternalVideoCard];
~~~~~~~~~~~~~~~~~~~ ^~~~~~~~~~~~~~~~~~~~~
2 errors generated.

** BUILD FAILED **

The following build commands failed:
CompileC /Users/user001/Library/Developer/Xcode/DerivedData/Wineskin-azotkdkrkrfzeseyxjkqlusdxxkh/Build/Intermediates.noindex/WineskinLauncher.build/Debug/WineskinLauncher.build/Objects-normal/x86_64/WineskinLauncherAppDelegate.o /Users/user001/Documents/wineskin/WineskinLauncher/WineskinLauncherAppDelegate.m normal x86_64 objective-c com.apple.compilers.llvm.clang.1_0.compiler
(1 failure)
bash-5.0$
`

[pmastrosimone]

Also having this same issue failing due to "Use of Undeclared Identifier" error
Build WineskinLauncher_2021-05-27T22-03-45.txt