Bundler не смог найти совместимые версии для gem "ruby":

Question

Я установил Ruby (Ruby + Devkit 2.6.6-1 (x64)) здесь: https://rubyinstaller.org/downloads/

Я всегда получаю следующее сообщение об ошибке, когда я пытаюсь установить Ruby для хранилища:

PS C:\Users\capoaira> cd myRepo
PS C:\Users\capoaira\myRepo> bundle install
Fetching gem metadata from https://rubygems.org/...........
Fetching gem metadata from https://rubygems.org/.
Resolving dependencies....
Bundler could not find compatible versions for gem "ruby ":
  In Gemfile:
    ruby

    github-pages was resolved to 188, which depends on
      nokogiri (>= 1.8.2, < 2.0) was resolved to 1.8.4, which depends on
        ruby  (< 2.6) x64-mingw32

Could not find gem 'ruby  (< 2.6)', which is required by gem 'nokogiri (>=
1.8.2, < 2.0)', in any of the relevant sources:
  the local ruby installation