
Today I asked the same question as in here, because it is the same error.
I was trying to install SharePoint Server 2019, and it failed on prerequisite when trying to download "Microsoft WCF Data Services 5.6". Here's the link I extract from log https://go.microsoft.com/fwlink/?LinkId=320724.
When I tried it
Where could I find that "Microsoft WCF Data Services 5.6"?

