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I do these commands for install jekyll :
gem install bundler_bundle install_bundle update

Bundler could not find compatible versions for gem "ffi":
      In snapshot (Gemfile.lock):
    ffi (= 1.15.0)

  In Gemfile:
    bootstrap (~> 4.4.1) was resolved to 4.4.1, which depends on
      sassc-rails (>= 2.0.0) was resolved to 2.1.2, which depends on
        sassc (>= 2.0) was resolved to 2.4.0, which depends on
          ffi (~> 1.9) x64-mingw32

    bootstrap (~> 4.4.1) was resolved to 4.4.1, which depends on
      sassc-rails (>= 2.0.0) was resolved to 2.1.2, which depends on
        sassc (>= 2.0) was resolved to 2.4.0, which depends on
          ffi (~> 1.9)

Running `bundle update` will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.
Mostafa Esl
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1 Answers1

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I did these steps and my problem was solved

first i tried this command

bundle add webrick

Then I saw into this problem

Could not find rake-13.0.1 in any of the sources Run bundle install to install missing gems.

Finally, I solved the problem by following the steps below

  1. Remove all the versions of Rake ==> gem uninstall rake
  2. Remove Gemfile.lock ==> rm Gemfile.lock
  3. Run bundle install ==> bundle install

Then

gem install rake --version=10.0.2

if still you have this problem check this Other solutions

Mostafa Esl
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