Understanding CMake versions

There are a number of people that are trying to get wxWidgets built and integrated with CodeBlocks.
Due to poor documentation, several of us have been led to a video by Yanson Tech who uses CMake as part of the process. We’ve run into a couple of issues.

  1. Using the most recent version of wxWidgets 3.1.4, CodeBlocks 20.03, gcc 9.2.0
    and CMake cmake-3.20.0-rc4-windows-x86_64.msi
    There is a warning with this release
    " Installer tool has changed. Uninstall CMake 3.4 or lower first!"
    What is the corresponding number for cmake-3.20.0-rc4? And what releases does 3.4 correspond to?

  2. When building wxWidgets we see three instances of the error
    "CMake Error: cmake version 3.20.0 "
    There does not seem to be any more information about what the error is.
    Does this indicate a compilation error with a file or a problem related to CMake?

Thank you

1.) Question Number 1

I think you might be confused about semantic versioning?

2.) Question number 2

Can you give more context/info?