Rake install throws error on Centos

[vinnytroia]

143 files inspected, no offenses detected
/root/.rbenv/versions/2.4.4/bin/ruby -I/root/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rspec-support-3.8.0/lib:/root/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rspec-core-3.8.0/lib /root/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rspec-core-3.8.0/exe/rspec --pattern spec/**{,/*/**}/*_spec.rb
...F

Failures:

1. CMSScanner::Controller::Core#setup_cache when no cache_dir supplied (or default) returns nil
   Failure/Error: if PublicSuffix.valid?(element)

   ArgumentError:
   invalid byte sequence in US-ASCII

   ./lib/cms_scanner/target/scope.rb:51:in `<<'

   ./lib/cms_scanner/target.rb:18:in `initialize'

   ./lib/cms_scanner/controller.rb:31:in `new'

   ./lib/cms_scanner/controller.rb:31:in `target'

   ./app/controllers/core.rb:10:in `setup_cache'

   ./spec/app/controllers/core_spec.rb:33:in `block (4 levels) in <top (required)>'

Finished in 0.02935 seconds (files took 1.08 seconds to load)
4 examples, 1 failure

Failed examples:

rspec ./spec/app/controllers/core_spec.rb:32 # CMSScanner::Controller::Core#setup_cache when no cache_dir supplied (or default) returns nil

Coverage report generated for RSpec to /opt/CMSScanner/coverage. 670 / 1221 LOC (54.87%) covered.
/root/.rbenv/versions/2.4.4/bin/ruby -I/root/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rspec-support-3.8.0/lib:/root/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rspec-core-3.8.0/lib /root/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rspec-core-3.8.0/exe/rspec --pattern spec/**{,/*/**}/*_spec.rb failed