AWSデプロイ時にwebpackerでエラー

自動デプロイをする時にwebpackerに関するエラーが発生してしまいます
Vue.jsを導入しようとこちらでwebpackerをインストールしました。
試しにGemfileのwebpackerをコメントアウトしてみるとデプロイは成功するので、webpackerが原因だと思っています
よろしくお願いします
この質問はマルチポストです　修正依頼参照

###エラー

NoMethodError: undefined method `strip' for nil:NilClass

/var/www/baseball-app/shared/bundle/ruby/2.5.0/bundler/gems/webpacker-31b7a6f31e38/lib/tasks/webpacker/check_yarn.rake:6:in `block (2 levels) in <top (required)>'

/var/www/baseball-app/shared/bundle/ruby/2.5.0/bundler/gems/webpacker-31b7a6f31e38/lib/tasks/webpacker/compile.rake:16:in `block in enhance_assets_precompile'

/var/www/baseball-app/shared/bundle/ruby/2.5.0/gems/rake-13.0.1/exe/rake:27:in `<top (required)>'

/home/ec2-user/.rbenv/versions/2.5.1/bin/bundle:23:in `load'

/home/ec2-user/.rbenv/versions/2.5.1/bin/bundle:23:in `<main>'

Tasks: TOP => webpacker:compile => webpacker:verify_install => webpacker:check_yarn

(See full trace by running task with --trace)

#####Gemfile

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.5.1'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.2.3'
# Use mysql as the database for Active Record
gem 'mysql2', '0.5.2'
# Use Puma as the app server
gem 'puma', '~> 3.11'
# Use SCSS for stylesheets
gem 'sass-rails', '5.0.7'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'mini_racer', platforms: :ruby

# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use ActiveStorage variant
# gem 'mini_magick', '~> 4.8'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.1.0', require: false

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
  gem 'capistrano'
  gem 'capistrano-rbenv'
  gem 'capistrano-bundler'
  gem 'capistrano-rails'
  gem 'capistrano3-unicorn'
end

group :development do
  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '>= 3.0.5', '< 3.2'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

group :test do
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '>= 2.15'
  gem 'selenium-webdriver'
  # Easy installation and use of chromedriver to run system tests with Chrome
  gem 'chromedriver-helper'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

gem 'pry-rails'
gem 'compass-rails', '3.1.0'
gem 'sprockets', '3.7.2'
gem 'kaminari'
gem 'jquery-rails'
gem "jquery-ui-rails"
gem 'fullcalendar-rails'
gem 'momentjs-rails'
gem 'rails-i18n'
gem 'devise'
gem 'carrierwave'
gem 'mini_magick'
gem "font-awesome-sass"

gem 'ancestry'
gem 'fog'
gem 'webpacker', github: 'rails/webpacker'
gem 'bootstrap', '~> 5.0.0.alpha2'
 
group :production do
  gem 'unicorn', '5.4.1'
end

###追記
エラー

Tasks: TOP => deploy:assets:precompile
(See full trace by running task with --trace)
The deploy has failed with an error: Exception while executing as ec2-user@54.168.63.207: rake exit status: 1
rake stdout: yarn install v1.22.10
[1/4] Resolving packages...
[2/4] Fetching packages...
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
Compiling...
Compilation failed:
yarn run v1.22.10
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.


error Command "webpack" not found.