Shockingly this did not solve the problem, manual patch installation fails as well.

Hello darkness my old friend, it appears I'm getting ERROR_SXS_ASSEMBLY_MISSING and the script I typically use for it is not working.

Lines from my CBS.log

2024-12-10 20:19:32, Error                 CSI    0000001c@2024/12/11:04:19:32.025 (F) onecore\base\wcp\sil\ntsystem.cpp(3486): Error STATUS_OBJECT_NAME_NOT_FOUND originated in function Windows::Rtl::SystemImplementation::DirectFileSystemProvider::SysCreateFile expression: (null)

2024-12-10 20:19:34, Error                 CSI    0000001d (F) STATUS_OBJECT_NAME_NOT_FOUND #413644# from Windows::Rtl::SystemImplementation::DirectFileSystemProvider::SysCreateFile(flags = 0, handle = {provider=NULL, handle=0, name= ("null")}, da = (FILE_GENERIC_READ), oa = @0xa61807d9a8->OBJECT_ATTRIBUTES {s:48; rd:null; on:[140]'\??\C:\WINDOWS\WinSxS\Manifests\amd64_microsoft-windows-t..oyment-languagepack_31bf3856ad364e35_10.0.26100.1_en-us_bf12458d5ec2a5a9.manifest'; a:(OBJ_CASE_INSENSITIVE)}, iosb = @0xa61807dd08, as = (null), fa = (FILE_ATTRIBUTE_[gle=0xd0000034]
2024-12-10 20:19:34, Error                 CSI    NORMAL), sa = (FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE), cd = FILE_OPEN, co = (FILE_NON_DIRECTORY_FILE|FILE_SYNCHRONOUS_IO_NONALERT|FILE_OPEN_FOR_BACKUP_INTENT), eab = NULL, eal = 0, disp = Invalid)
2024-12-10 20:19:34, Error                 CSI    0000001e (F) STATUS_OBJECT_NAME_NOT_FOUND #413643# from Windows::Rtl::SystemImplementation::CSystemIsolationLayer::OpenFilesystemFile(flags = 0, da = (FILE_GENERIC_READ), fn = [l:137]'\SystemRoot\WinSxS\Manifests\amd64_microsoft-windows-t..oyment-languagepack_31bf3856ad364e35_10.0.26100.1_en-us_bf12458d5ec2a5a9.manifest', sa = (FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE), oo = (FILE_SYNCHRONOUS_IO_NONALERT|FILE_NON_DIRECTORY_FILE|FILE_OPEN_FOR_BACKUP_INTENT), file = NULL, disp = Invalid)
2024-12-10 20:19:34, Error                 SXS    Could not open \SystemRoot\WinSxS\Manifests\amd64_microsoft-windows-t..oyment-languagepack_31bf3856ad364e35_10.0.26100.1_en-us_bf12458d5ec2a5a9.manifest: STATUS_OBJECT_NAME_NOT_FOUND
2024-12-10 20:19:34, Error                 SXS    WIL Origination: onecore\base\servicing\turbostack\lib\turbostackutil.cpp(80)\TurboStack.dll!00007FF86E70070E: (caller: 00007FF86E700394) Exception(1) tid(1ba0) C0000034 Object Name not found.
2024-12-10 20:19:34, Error                 CSI    0000001f@2024/12/11:04:19:34.045 (F) onecore\base\servicing\turbostack\lib\turbostackutil.cpp(80): Error HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) originated in function (null) expression: (null)
2024-12-10 20:19:34, Error                 SXS    WIL Origination: onecore\base\servicing\turbostack\lib\query.cpp(999)\TurboStack.dll!00007FF86E76A16C: (caller: 00007FF86E6885C9) LogHr(1) tid(1ba0) 80070002 The system cannot find the file specified.
2024-12-10 20:19:34, Error                 CSI    00000020@2024/12/11:04:19:34.073 (F) onecore\base\servicing\turbostack\lib\query.cpp(999): Error HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) originated in function (null) expression: (null)

2024-12-10 20:19:49, Error                 CBS    Failed to load C:\WINDOWS\TEMP\SSS_e79cd3ea834bdb0101000000ac04b80e\cmsofflineservicing.dll.: HRESULT_FROM_WIN32(ERROR_MOD_NOT_FOUND)

2024-12-10 20:33:13, Error                 CSI    0000029a@2024/12/11:04:33:13.852 (F) Attempting to mark store corrupt with category [l:15 ml:16]'CorruptManifest'[gle=0x80004005]
2024-12-10 20:33:13, Error                 CSI    0000029b@2024/12/11:04:33:13.852 (F) onecore\base\wcp\componentstore\csd_locking.cpp(97): Error STATUS_SXS_ASSEMBLY_MISSING originated in function CCSDirectTransaction::LockComponent expression: (null)
2024-12-10 20:33:13, Error                 CSI    0000029c (F) STATUS_SXS_ASSEMBLY_MISSING #9858843# from CCSDirectTransaction::OperateEnding at index 0 of 1 operations, disposition 2[gle=0xd015000c]
2024-12-10 20:33:13, Error                 CSI    0000029d (F) HRESULT_FROM_WIN32(ERROR_SXS_ASSEMBLY_MISSING) #9858735# from Windows::ServicingAPI::CCSITransaction::ICSITransaction_UnpinDeployment(Flags = 0, a = Microsoft-Windows-Internet-Naming-Tools-Deployment, version 10.0.26100.1882, arch amd64, nonSxS, pkt {l:8 b:31bf3856ad364e35}, cb = (null), s = (null), rid = 'Microsoft-Windows-Internet-Naming-Tools-Package~31bf3856ad364e35~amd64~~10.0.26100.1882.WINS-Server-Tools', disp = 0)[gle=0x80073701]
2024-12-10 20:33:13, Error                 CBS    Failed to process single phase execution. [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]

2024-12-10 20:33:17, Error                 CBS    Failed to perform operation.  [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]

Strange the package it's complaining about is WINS-Server-Tools. Who still has WINS installed on Windows Server?

I am chalking this up to a bug in the patch for now and will wait and see.

Has anoyne successfully patched a 2025 Core box?