The “TransformWebConfig” task failed unexpectedly – System.Exception: The acceptable value for AspNetCoreModuleHostingModel property is either

I would suggest disabling web.config transforms altogether. In an ASP.Net Core project you probably do not need to transform web.configs since supplying environment variables is handled by convention with appsettings.[Environment].json files.

From the docs at https://learn.microsoft.com/en-us/aspnet/core/host-and-deploy/iis/?view=aspnetcore-2.2:

To prevent the Web SDK from transforming the web.config file, use the <IsTransformWebConfigDisabled> property in the .csproj file:

<PropertyGroup>
   <IsTransformWebConfigDisabled>true</IsTransformWebConfigDisabled>
</PropertyGroup>