I downloaded the latest version of Service Fabric SDK 2.4.164 and try to create a new simple stateless service. Build succeeded but when I run it to debug I got:
Azure Service Fabri only supports x64 platform. It seems you're using some x86 tools. If you have installed dotnet (CLI) tools for x64 and x86 then check Path environment variable. The first one should be path to the x64 components, it helped me to solve the same issue