I'm trying to package iOS project and get error

Hello,

I want to package project to iOS.Do it on Mac. Whole project is in Blueprint. Have done this before and everything was fine and I don’t know what happened. Now get error:

UATHelper: Packaging (iOS): ERROR: System.IO.FileNotFoundException: Could not find file “/Users/…/Documents/Unreal Projects/Platforms/Binaries/IOS/Platforms.target”

Please help!

Ok, solved by enabled subsystem plugin. But have another problem:

UATHelper: Packaging (iOS): Running UnrealHeaderTool “/Users/grzegorzbilski/Documents/Unreal Projects/Platforms/Platforms.uproject” “/Users/grzegorzbilski/Documents/Unreal Projects/Platforms/Intermediate/Build/IOS/Platforms/Development/Platforms.uhtmanifest” -LogCmds=“loginit warning, logexit warning, logdatabase error” -Unattended -WarningsAsErrors -ins
talled
UATHelper: Packaging (iOS): 2018-12-15 13:23:33.509 UnrealHeaderTool[2826:22266] Assertion failed: Class->Children == NULL [File:/Users/build/Build/++UE4/Sync/Engine/Source/Programs/UnrealHeaderTool/Private/HeaderParser.cpp] [Line: 5622]
UATHelper: Packaging (iOS):
UATHelper: Packaging (iOS): /Users/grzegorzbilski/Documents/Unreal Projects/Platforms/Intermediate/Plugins/NativizedAssets/IOS/Game/Source/NativizedAssets/Public/ThirdPersonCharacter__pf1194704952.h(17) : LogMac: Error: appError called: Assertion failed: Class->Children == NULL [File:/Users/build/Build/++UE4/Sync/Engine/Source/Programs/UnrealHeaderTool/Pri
vate/HeaderParser.cpp] [Line: 5622]
UATHelper: Packaging (iOS): Error: UnrealHeaderTool failed for target ‘Platforms’ (platform: IOS, module info: /Users/grzegorzbilski/Documents/Unreal Projects/Platforms/Intermediate/Build/IOS/Platforms/Development/Platforms.uhtmanifest, exit code: CrashOrAssert (3)).
UATHelper: Packaging (iOS): Took 43.582105s to run mono, ExitCode=3
UATHelper: Packaging (iOS): ERROR: UnrealBuildTool failed. See log for more details. (/Users/grzegorzbilski/Library/Logs/Unreal Engine/LocalBuildLogs/UBT-Platforms-IOS-Development.txt)
UATHelper: Packaging (iOS): (see /Users/…/Library/Logs/Unreal Engine/LocalBuildLogs/Log.txt for full exception trace)
UATHelper: Packaging (iOS): AutomationTool exiting with ExitCode=3 (Error_UnknownCommand)
UATHelper: Packaging (iOS): RunUAT ERROR: AutomationTool was unable to run successfully.
PackagingResults: Error: Unknown Command

Please help