Your bundle is locked to ffi (1.11.0), but that version could not be found in any of the sources listed in your Gemfile

Question

I get this error when starting the rails server: I've tried gem install, gem update, bundle update, bundle install.

Your bundle is locked to ffi (1.11.0), but that version could not be found in any of the sources listed in your Gemfile. If you haven't changed sources, that means the author of ffi
(1.11.0) has removed it. You'll need to update your bundle to a version other than ffi (1.11.0) that hasn't been removed in order to install.

can you help? thank you!

source 'https://rubygems.org'
ruby '2.5.3'

gem 'bootsnap', require: false
gem 'jbuilder', '~> 2.0'
gem 'pg', '~> 0.21'
gem 'puma'
gem 'shopify_app'
gem 'rails', '5.2.3'
gem 'redis'
gem 'devise'

gem 'autoprefixer-rails'
gem 'font-awesome-sass', '~> 5.6.1'
gem 'sassc-rails'
gem 'simple_form'
gem 'uglifier'
gem 'webpacker'

group :development do
  gem 'web-console', '>= 3.3.0'
end

group :development, :test do
  gem 'pry-byebug'
  gem 'pry-rails'
  gem 'listen', '~> 3.0.5'
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
  gem 'dotenv-rails'

end

this is my rake file:

require_relative 'config/application'

Rails.application.load_tasks

Answer 1

The issue you're hitting is that bundler could not find that version of ffi. You most likely installed it originally when creating the project or adding a gem. The ffi version 1.11.0 was pulled from RubyGems.

Run bundle update on your project to get the latest version, which is 1.11.1 as of today. That should fix your issue as when you deploy next when heroku runs bundler, it will pick up that version from RubyGems.