dism always returns an error when changing system packages

I am trying to repair a system in order to get updates working.

I am working with a copy of the vhdx, so I am free to experiment.....

dism /online /cleanup-image /scanhealth says all is fine.

Summary:

Operation: Detect only 

Operation result: 0x0

Last Successful Step: CSI store detection completes.

Total Detected Corruption: 0

CBS Manifest Corruption: 0

CBS Metadata Corruption: 0

CSI Manifest Corruption: 0

CSI Metadata Corruption: 0

CSI Payload Corruption: 0

Total Repaired Corruption: 0

CBS Manifest Repaired: 0

CSI Manifest Repaired: 0

CSI Payload Repaired: 0

CSI Store Metadata refreshed: True

Total Operation Time: 110 seconds.

2019-04-17 20:09:38, Info                  CBS    CheckSur: hrStatus: 0x0 [S_OK], download Result: 0x0 [S_OK]

2019-04-17 20:09:38, Info                  CBS    Count of times corruption detected: 0

dism /online /enable-feature /featurename:rasrip returns "The referenced assembly could not be found."

2019-05-05 09:10:43, Info                  CBS    Exec: 1 deployments need bulk staging

2019-05-05 09:10:43, Error                 CSI    00000008@2019/5/5:13:10:43.048 (F) onecore\base\wcp\componentstore\csd_locking.cpp(200): Error STATUS_SXS_ASSEMBLY_MISSING originated in function CCSDirectTransaction::LockComponent expression: (null)

[gle=0x80004005]

2019-05-05 09:10:43, Info                  CBS    Added C:\Windows\Logs\CBS\CBS.log to WER report.

2019-05-05 09:10:43, Info                  CBS    Not able to add pending.xml to Windows Error Report. [HRESULT = 0x80070002 - ERROR_FILE_NOT_FOUND]

2019-05-05 09:10:43, Info                  CBS    Not able to add pending.xml.bad to Windows Error Report. [HRESULT = 0x80070002 - ERROR_FILE_NOT_FOUND]

2019-05-05 09:10:43, Info                  CBS    Not able to add poqexec.log to Windows Error Report. [HRESULT = 0x80070002 - ERROR_FILE_NOT_FOUND]

2019-05-05 09:10:43, Info                  CBS    Not able to add SCM.EVM to Windows Error Report. [HRESULT = 0x80070002 - ERROR_FILE_NOT_FOUND]

2019-05-05 09:10:43, Error                 CSI    00000009 (F) STATUS_SXS_ASSEMBLY_MISSING #1594# from CCSDirectTransaction::OperateEnding at index 0 of 1 operations, disposition 2[gle=0xd015000c]

2019-05-05 09:10:43, Error                 CSI    0000000a (F) HRESULT_FROM_WIN32(ERROR_SXS_ASSEMBLY_MISSING) #1442# from Windows::ServicingAPI::CCSITransaction::ICSITransaction_PinDeployment(Flags = 0, a = Microsoft-Windows-RasRipListener-Deployment, version 10.0.14393.0, arch amd64, nonSxS, pkt {l:8 b:31bf3856ad364e35}, cb = (null), s = (null), rid = 'Microsoft-Windows-RasRip-Package~31bf3856ad364e35~amd64~~10.0.14393.0.RasRip', rah = (null), manpath = (null), catpath = (null), ed = 0, disp = 0)[gle=0x80073701]

2019-05-05 09:10:43, Info                  CBS    Failed to pin deployment while resolving Update: Microsoft-Windows-RasRip-Package~31bf3856ad364e35~amd64~~10.0.14393.0.RasRip from file: (null) [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]

2019-05-05 09:10:43, Info                  CBS    Failed to bulk stage deployment manifest and pin deployment for package:Microsoft-Windows-RasRip-Package~31bf3856ad364e35~amd64~~10.0.14393.0 [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]

2019-05-05 09:10:43, Info                  CBS    CommitPackagesState: Started persisting state of packages

2019-05-05 09:10:43, Info                  CBS    CommitPackagesState: Completed persisting state of packages

2019-05-05 09:10:43, Info                  CSI    0000000b@2019/5/5:13:10:43.548 CSI Transaction @0x23828973a80 destroyed

2019-05-05 09:10:43, Info                  CBS    Perf: Resolve chain complete.

2019-05-05 09:10:43, Info                  CBS    Failed to resolve execution chain. [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]

2019-05-05 09:10:43, Error                 CBS    Failed to process single phase execution. [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]

2019-05-05 09:10:43, Info                  CBS    WER: Generating failure report for package: Microsoft-Windows-Foundation-Package~31bf3856ad364e35~amd64~~10.0.14393.0, status: 0x80073701, failure source: Resolve, start state: Installed, target state: Installed, client id: DISM Package Manager Provider

AFAIK this is telling me that the Microsoft-Windows-Foundation-Package is missing "something"

The log files are pretty worthless. 

I have tried ProcMon to get a clue about what is missing, but unable to find it.

I believe I have to use windbg and/or Time Travel Tracing in order to find this elusive assembly.

How do I determine what it is complaining about ?

Does anyone have any experience resolving these issues ?

already tried:

dism /online /cleanup-image /scanhealthdism /online /cleanup-image /restorehealth

dism /online /cleanup-image /analyzecomponentstore

sfc /scannow

repair install -- fails with same error 0x80073701

copy COMPONENTS hive from same version DVD, then reinstall -- fails with same error 0x80073701