rails aborted!のエラーを治したい

Question

このエラーの治し方を教えてもらえませんか。
何かのgemが足らないということは突き止めたのですがそれがなんなのか、何処を見ればいいのかわかりません。

my name$ RAILS_ENV=production bundle exec rails asset:precompile
rails aborted!
Don't know how to build task 'asset:precompile' (see --tasks)
/home/mastodon/live/vendor/bundle/ruby/2.5.0/gems/railties-5.2.1/lib/rails/commands/rake/rake_command.rb:23:in `block in perform'
/home/mastodon/live/vendor/bundle/ruby/2.5.0/gems/railties-5.2.1/lib/rails/commands/rake/rake_command.rb:20:in `perform'
/home/mastodon/live/vendor/bundle/ruby/2.5.0/gems/railties-5.2.1/lib/rails/command.rb:48:in `invoke'
/home/mastodon/live/vendor/bundle/ruby/2.5.0/gems/railties-5.2.1/lib/rails/commands.rb:18:in `<top (required)>'
/home/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require'
/home/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `block in require_with_bootsnap_lfi'
/home/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/loaded_features_index.rb:65:in `register'
/home/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:20:in `require_with_bootsnap_lfi'
/home/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:29:in `require'
/home/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.1/lib/active_support/dependencies.rb:287:in `block in require'
/home/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.1/lib/active_support/dependencies.rb:253:in `load_dependency'
/home/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.1/lib/active_support/dependencies.rb:287:in `require'
bin/rails:4:in `<main>'
(See full trace by running task with --trace)

Answer 1

スペルミスでした。
誤：RAILS_ENV=production bundle exec rails asset:precompile
正：RAILS_ENV=production bundle exec rails assets:precompile