Ruby FTPS错误，带有双包FTPS

我正在尝试使用以下代码使用Ruby gem double_bag_FTPS连接到FTPS服务器

require 'double_bag_ftps'
ftps = DoubleBagFTPS.new
ftps.ssl_context = DoubleBagFTPS.create_ssl_context(:verify_mode => OpenSSL::SSL::VERIFY_NONE)
ftps.connect('xx.xx.xx.xx')
ftps.login('user', 'password')
files = ftps.nlst
puts files.length

尝试连接时出现以下错误

/home/indika/.rvm/gems/ruby-1.9.3-p0@global/gems/double-bag-ftps-0.1.0/lib/double_bag_ftps.rb:148:in `connect': Broken pipe - SSL_connect (Errno::EPIPE)
        from /home/msc22/.rvm/gems/ruby-1.9.3-p0@global/gems/double-bag-ftps-0.1.0/lib/double_bag_ftps.rb:148:in `ssl_socket'
        from /home/msc22/.rvm/gems/ruby-1.9.3-p0@global/gems/double-bag-ftps-0.1.0/lib/double_bag_ftps.rb:125:in `transfercmd'
        from /home/msc22/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/net/ftp.rb:478:in `block (2 levels) in retrlines'
        from /home/msc22/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/net/ftp.rb:178:in `with_binary'
        from /home/msc22/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/net/ftp.rb:477:in `block in retrlines'
        from /home/msc22/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
        from /home/msc22/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/net/ftp.rb:476:in `retrlines'
        from /home/msc22/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/net/ftp.rb:703:in `nlst'
        from backup_collector.rb:8:in `<main>'

/home/indika/.rvm/gems/ruby-1.9.3-p0@global/gems/double-bag-ftps-0.1.0/lib/double-bag-ftps.rb:148:in'connect'：断管-SSL\u connect（Errno:：EPIPE）
from/home/msc22/.rvm/gems/ruby-1.9.3-p0@global/gems/double-bag-ftps-0.1.0/lib/double-bag-ftps.rb:148:in'ssl\u socket'
from/home/msc22/.rvm/gems/ruby-1.9.3-p0@global/gems/double-bag-ftps-0.1.0/lib/double_-bag_-ftps.rb:125:in'transfercmd'
from/home/msc22/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/net/ftp.rb:478:in`block（2层）in retrline'
from/home/msc22/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/net/ftp.rb:178:in'with_binary'
from/home/msc22/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/net/ftp.rb:477:in'block in retrline'
from/home/msc22/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/monitor.rb:211:in'mon_synchronize'
from/home/msc22/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/net/ftp.rb:476:in'retrline'
from/home/msc22/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/net/ftp.rb:703:in'nlst'
从备份收集器.rb:8:in`'

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非常感谢您的帮助。

您使用的是什么ruby版本？如果您使用的是ruby 2.4，请点击这里：您使用的是什么ruby版本？如果您使用的是ruby 2.4，请点击此处：