Ready for a challenge? - Unable to install .NET 3.5 on Windows Server 2016

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I needed to install .NET 3.5 on Server 2016 but have hit all of the roadblocks and need help. Here is what I have tried so far...

1. I tried to add the feature via the server manager but it ended with code 0x80070002. I did have to provide a path to the sources\sxs folder for the cab file which I expected but that didn't help.
2. I tried using the DISM powershell command to add the feature, both using the source location and also using /All so that it downloads the files from Windows Update. The end result was the same as #1 attempt - 0x80070002.
3. I made sure all updates for the OS have been applied and that updates for 'other Microsoft products' was checked. this made no change in the error.
4. I checked the installed packages via powershell and it shows 3.5 as removed, which again is expected for Server 2016 as they intentionally left it out but provided the cab file in the install media.
5. I have executed sfc /scannow with no errors
6. I have run a clean (maybe is called rebuild) dism package command
7. I have tried installing under a fresh admin user profile
8. I have researched for around 3 hours on the forums so I look forward to the various input

I have uploaded both the DISM and CBS logs. I started fresh with both logs so they contain only details related to a single attempt t install via the server manager.

Microsoft Logs - Shared with pCloud

Thanks for the help!

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