插件中的Unreal Engine 4.20生成错误:[Adaptive Unity Build]为排除的文件禁用PCH

在更新到Unreal4.20后尝试构建项目时,插件代码中遇到以下错误:

1>[Adaptive unity build] Disabling PCH for excluded files. Set bAdaptiveUnityDisablesPCH to false in BuildConfiguration.xml to change this behavior. 
1>[Adaptive unity build] Excluded from MyUnrealPlugin unity file: MyFile.cpp

作为一个实验,我按照错误消息的建议禁用了badaptiveunitydisablespch,但这样做只是将上面的错误替换为:

<>c.<PrintExceptionInfo>b__4_1: ==============================================================================
<>c.<PrintExceptionInfo>b__4_0: UnrealBuildTool: ERROR: UBT ERROR: Failed to produce item: E:\GameDirectory\UE4\MyGame\Plugins\MyPlugin\Intermediate\Build\Win64\UE4Editor\Development\MyPlugin\UE4Editor-MyPlugin.lib
<>c.<PrintExceptionInfo>b__4_0:                         (see ../Programs/UnrealBuildTool/Log.txt for full exception trace)
<>c.<PrintExceptionInfo>b__4_1: 
<>c.<PrintExceptionInfo>b__4_1: BuildException: UBT ERROR: Failed to produce item: E:\GameDirectory\UE4\MyGame\Plugins\MyPlugin\Intermediate\Build\Win64\UE4Editor\Development\MyPlugin\UE4Editor-MyPlugin.lib
<>c.<PrintExceptionInfo>b__4_1:    at UnrealBuildTool.ActionGraph.ExecuteActions(BuildConfiguration BuildConfiguration, List`1 ActionsToExecute, Boolean bIsRemoteCompile, String& ExecutorName, String TargetInfoForTelemetry, EHotReload HotReload) in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\System\ActionGraph.cs:line 570
<>c.<PrintExceptionInfo>b__4_1:    at UnrealBuildTool.UnrealBuildTool.RunUBT(BuildConfiguration BuildConfiguration, String[] Arguments, FileReference ProjectFile, Boolean bCatchExceptions) in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.cs:line 1673
<>c.<PrintExceptionInfo>b__4_1: ==============================================================================

有什么想法我应该做什么来纠正这一点吗?

非常感谢!