rammap issues - does not show up anything (win10 pro build 17120)

RAMMap uses internal API to query the memory data. Such API change in new Windows 10 versions. And it looks like Microsoft made some changes in the last RS4 preview Builds that cause the tool to fail.

So go back to the Windows 10 v1709 or wait until next month when Windows 10 v1803 gets official released. I think Mark will update all tools to make them compatible.