I am not sure how to debug this compile error. It started popping up when adding an character that uses an AI Controller. VS builds the project without error.
Info Compiling game modules for hot reload
Info ERROR: System.IO.FileNotFoundException: Could not find file 'D:\Dropbox\Dev\ProjectName\Intermediate\Build\Win64\ProjectName\Development\UE4Editor-ProjectName-7371.dll.response'.
Info File name: 'D:\Dropbox\Dev\TopShelfHockey\Intermediate\Build\Win64\ProjectName\Development\UE4Editor-ProjectName-7371.dll.response'
Info at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
Info at System.IO.File.InternalCopy(String sourceFileName, String destFileName, Boolean overwrite, Boolean checkHost)
Info at UnrealBuildTool.UnrealBuildTool.PatchActionHistoryForHotReloadAssembling(List`1 OnlyModules)
Info at UnrealBuildTool.UnrealBuildTool.RunUBT(String[] Arguments)