I have found a workaround. I tried installing the update using the sccm manager on my windows 10 client and it worked !! I'm now on 1902. Thanks for your attention.
I have changed the names of our servers in the log files..
When I ignore the error it ends with what is seen in the screenshot.. and won't go any further.
CMUpdate.log ConfigMgrPrereq.log
I'm upgrading from 1810, things i've tried
1: installed NDP47-KB3186497-x86-x64-AllOS-ENU.exe
2: installed MDAC (in some forums it is said it would help)
3: Run NetFxRepairTool.exe
4: Restarted the SQL and SCCM server twice
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