bundle installでエラー発生

bundle installでエラーが出ております
上３行のwarnignはパーミッションは変更すればいいと思うのですが、

in `require': cannot load such file -- arel (LoadError)
このエラーがどう解決してよいかわかりません

わかる方いましたらお願い致します

$ bundle exec rails s
/home/****/.rbenv/versions/2.2.5/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/shared_helpers.rb:78: warning: Insecure world writable dir /home/****/workspace in PATH, mode 040777
/home/*****/.rbenv/versions/2.2.5/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/shared_helpers.rb:78: warning: Insecure world writable dir /home/****/workspace in PATH, mode 040777
/home/****/workspace/adc/vendor/bundler/ruby/2.2.0/gems/activesupport-3.2.14/lib/active_support/values/time_zone.rb:270: warning: circular argument reference - now
/home/****/workspace/adc/vendor/bundler/ruby/2.2.0/gems/activerecord-3.2.14/lib/active_record.rb:27:i
	from /home/****/workspace/adc/vendor/bundler/ruby/2.2.0/gems/activerecord-3.2.14/lib/active_record.rb:27:in `<top (required)>'
	from /home/****/workspace/adc/vendor/bundler/ruby/2.2.0/gems/yaml_db-0.7.0/lib/yaml_db.rb:3:in `require'
	from /home/****/workspace/adc/vendor/bundler/ruby/2.2.0/gems/yaml_db-0.7.0/lib/yaml_db.rb:3:in `<top (required)>'
	from /home/****/.rbenv/versions/2.2.5/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `require'
	from /home/****/.rbenv/versions/2.2.5/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
	from /home/****/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `each'
	from /home/****/.rbenv/versions/2.2.5/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `block in require'
	from /home/****/.rbenv/versions/2.2.5/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `each'
	from /home/****/.rbenv/versions/2.2.5/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `require'
	from /home/****/.rbenv/versions/2.2.5/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler.rb:134:in `require'
	from /home/****/workspace/adc/config/application.rb:7:in `<top (required)>'
	from /home/****/workspace/adc/vendor/bundler/ruby/2.2.0/gems/railties-3.2.14/lib/rails/commands.rb:53:in `require'
	from /home/****/workspace/adc/vendor/bundler/ruby/2.2.0/gems/railties-3.2.14/lib/rails/commands.rb:53:in `block in <top (required)>'
	from /home/****/workspace/adc/vendor/bundler/ruby/2.2.0/gems/railties-3.2.14/lib/rails/commands.rb:50:in `tap'
	from /home/****/workspace/adc/vendor/bundler/ruby/2.2.0/gems/railties-3.2.14/lib/rails/commands.rb:50:in `<top (required)>'
	from script/rails:6:in `require'
	from script/rails:6:in `<main>'