In UE 4.21 i can’t regenerate or generate project file for XCode:
Running Mono...
Setting up Mono
/Users/Shared/EpicGames/UE_4.21/Engine /Users/Shared/EpicGames/UE_4.21/Engine/Binaries/Mac
Discovering modules, targets and source code for project...
Generating data for project indexing...
Generating data for project indexing... 100%
Writing project files...
Writing project files... 33%
ERROR: UnrealBuildTool Exception: System.FormatException: Unknown char
at System.Double.Parse (System.String s, NumberStyles style, IFormatProvider provider) [0x00000] in <filename unknown>:0
at System.Single.Parse (System.String s) [0x00000] in <filename unknown>:0
at UnrealBuildTool.IOSExports.SupportsIconCatalog (Tools.DotNETCommon.DirectoryReference ProjectDirectory, Tools.DotNETCommon.FileReference BuildRecieptFileName) [0x00000] in <filename unknown>:0
at UnrealBuildTool.UEDeployIOS.GenerateIOSPList (Tools.DotNETCommon.FileReference ProjectFile, UnrealTargetConfiguration Config, System.String ProjectDirectory, Boolean bIsUE4Game, System.String GameName, System.String ProjectName, System.String InEngineDir, System.String AppDirectory, Tools.DotNETCommon.FileReference BuildRecieptFileName, System.Boolean& bSupportsPortrait, System.Boolean& bSupportsLandscape, System.Boolean& bSkipIcons, UnrealBuildTool.UEDeployIOS InThis) [0x00000] in <filename unknown>:0
at UnrealBuildTool.XcodeProjectFile.AppendNativeTargetBuildConfiguration (System.Text.StringBuilder Content, XcodeBuildConfig Config, System.String ConfigGuid, Boolean bIsAGame, Tools.DotNETCommon.FileReference ProjectFile) [0x00000] in <filename unknown>:0
at UnrealBuildTool.XcodeProjectFile.AppendXCBuildConfigurationSection (System.Text.StringBuilder Content, System.Collections.Generic.Dictionary`2 ProjectBuildConfigs, System.Collections.Generic.Dictionary`2 TargetBuildConfigs, System.Collections.Generic.Dictionary`2 BuildTargetBuildConfigs, System.Collections.Generic.Dictionary`2 IndexTargetBuildConfigs, Boolean bIsAGame, Tools.DotNETCommon.FileReference GameProjectPath) [0x00000] in <filename unknown>:0
at UnrealBuildTool.XcodeProjectFile.WriteProjectFile (System.Collections.Generic.List`1 InPlatforms, System.Collections.Generic.List`1 InConfigurations) [0x00000] in <filename unknown>:0
at UnrealBuildTool.ProjectFileGenerator.WriteProjectFiles () [0x00000] in <filename unknown>:0
at UnrealBuildTool.ProjectFileGenerator.GenerateProjectFiles (System.String[] Arguments) [0x00000] in <filename unknown>:0
at UnrealBuildTool.UnrealBuildTool.GuardedMain (System.String[] Arguments) [0x00000] in <filename unknown>:0