I keep getting an error when making a diags binary for a specific sdk:
(Note: I do get a successful build without specifying the DUT sdk, but that build wouldn’t load in iBoot.) 
(Other note: This was run on a source based off of the latest version of midas on branch main)

Command: 

$ SDK_VERS=StarPhoenix21A102281g make J314c.release

Stack trace:

build.py...
 : error C0DE: Unknown fatal error when processing [/Users/smartlab/Desktop/midas/midas/AppleSdkPkg/AppleSdk.dec]

(Please send email to devel@edk2.groups.io for help, attaching following call stack trace!)

(Python 2.7.16 on darwin) Traceback (most recent call last):
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/BinWrappers/PosixLike/../../Source/Python/build/build.py", line 2698, in Main
    MyBuild.Launch()
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/BinWrappers/PosixLike/../../Source/Python/build/build.py", line 2493, in Launch
    self._MultiThreadBuildPlatform()
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/BinWrappers/PosixLike/../../Source/Python/build/build.py", line 2285, in _MultiThreadBuildPlatform
    Wa, self.BuildModules = self.PerformAutoGen(BuildTarget,ToolChain)
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/BinWrappers/PosixLike/../../Source/Python/build/build.py", line 2149, in PerformAutoGen
    self.Progress
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/Source/Python/AutoGen/WorkspaceAutoGen.py", line 43, in __init__
    self._InitWorker(Workspace, MetaFile, Target, Toolchain, Arch, *args, **kwargs)
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/Source/Python/AutoGen/WorkspaceAutoGen.py", line 117, in _InitWorker
    self.ProcessPcdType()
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/Source/Python/AutoGen/WorkspaceAutoGen.py", line 264, in ProcessPcdType
    Platform.Pcds
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/Source/Python/Workspace/DscBuildData.py", line 1225, in Pcds
    self._Pcds = self.UpdateStructuredPcds(MODEL_PCD_TYPE_LIST, self._Pcds)
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/Source/Python/Workspace/DscBuildData.py", line 1607, in UpdateStructuredPcds
    Str_Pcd_Values = self.GenerateByteArrayValue(S_pcd_set)
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/Source/Python/Workspace/DscBuildData.py", line 2861, in GenerateByteArrayValue
    if Cache.Includes:
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/Source/Python/Workspace/DecBuildData.py", line 301, in Includes
    ErrorCode, ErrorInfo = File.Validate()
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/Source/Python/Common/Misc.py", line 1573, in Validate
    RealFile, RealRoot = RealPath2(self.File, self.Root, self.AlterRoot)
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/Source/Python/Common/Misc.py", line 1552, in RealPath2
    NewFile = GlobalData.gAllFiles[os.path.normpath(os.path.join(Dir, File))]
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/Source/Python/Common/Misc.py", line 640, in __getitem__
    for F in os.listdir(ParentDir):
  File "/Users/smartlab/Desktop/midas/midas/Edk2/BaseTools/Source/Python/Common/LongFilePathOs.py", line 58, in listdir
    uList = os.listdir(u"%s" % LongFilePath(path))
OSError: [Errno 2] No such file or directory: 'AppleSdkPkg/._sym_xcode_sdk'


- Failed -
Build end time: 10:58:48, Aug.04 2021
Build total time: 00:00:03

make[1]: *** [Build] Error 1
make: *** [J314c.release] Error 2