NoMethodError: undefined method `length' for nil:NilClass

[mattk7]

Hi,

I installed the language-identifier but once I run the example (i.e. echo "This is absolutelty great" | language-identifier ) I get the following error:

NoMethodError: undefined method `length' for nil:NilClass
             short_input? at /home/user/.gem/jruby/2.3.1/gems/opener-language-identifier-4.2.2/lib/opener/language_identifier/detector.rb:166
       determine_profiles at /home/user/.gem/jruby/2.3.1/gems/opener-language-identifier-4.2.2/lib/opener/language_identifier/detector.rb:158
             new_detector at /home/user/.gem/jruby/2.3.1/gems/opener-language-identifier-4.2.2/lib/opener/language_identifier/detector.rb:112
                   detect at /home/user/.gem/jruby/2.3.1/gems/opener-language-identifier-4.2.2/lib/opener/language_identifier/detector.rb:84
                      run at /home/user/.gem/jruby/2.3.1/gems/opener-language-identifier-4.2.2/lib/opener/language_identifier.rb:62
  block in configure_slop at /home/user/.gem/jruby/2.3.1/gems/opener-language-identifier-4.2.2/lib/opener/language_identifier/cli.rb:74
                   parse! at /home/user/.gem/jruby/2.3.1/gems/slop-3.6.0/lib/slop.rb:260
                    parse at /home/user/.gem/jruby/2.3.1/gems/slop-3.6.0/lib/slop.rb:211
                      run at /home/user/.gem/jruby/2.3.1/gems/opener-language-identifier-4.2.2/lib/opener/language_identifier/cli.rb:20
                   <main> at /home/user/.gem/jruby/2.3.1/gems/opener-language-identifier-4.2.2/bin/language-identifier:7
                     load at org/jruby/RubyKernel.java:977
                   <main> at /home/user/.gem/jruby/2.3.1/bin/language-identifier:22

Could you help me debug the error?

Thanks