fontello open returning 301 redirect error after rails update

[EddieOne]

fontello open

---- open ----
Traceback (most recent call last):
13: from /root/.rbenv/versions/2.6.6/bin/fontello:23:in <main>' 12: from /root/.rbenv/versions/2.6.6/bin/fontello:23:in load'
11: from /root/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/fontello_rails_converter-0.4.6/bin/fontello:138:in <top (required)>' 10: from /root/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/fontello_rails_converter-0.4.6/lib/fontello_rails_converter/cli.rb:17:in open'
9: from /root/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/fontello_rails_converter-0.4.6/lib/fontello_rails_converter/fontello_api.rb:16:in new_session_from_config' 8: from /root/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/rest-client-2.1.0/lib/restclient.rb:70:in post'
7: from /root/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/rest-client-2.1.0/lib/restclient/request.rb:63:in execute' 6: from /root/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/rest-client-2.1.0/lib/restclient/request.rb:163:in execute'
5: from /root/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/rest-client-2.1.0/lib/restclient/request.rb:727:in transmit' 4: from /root/.rbenv/versions/2.6.6/lib/ruby/2.6.0/net/http.rb:920:in start'
3: from /root/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/rest-client-2.1.0/lib/restclient/request.rb:743:in block in transmit' 2: from /root/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/rest-client-2.1.0/lib/restclient/request.rb:836:in process_result'
1: from /root/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/rest-client-2.1.0/lib/restclient/abstract_response.rb:123:in return!' /root/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/rest-client-2.1.0/lib/restclient/abstract_response.rb:249:in exception_with_response': 301 Moved Permanently (RestClient::MovedPermanently)

[duleorlovic]

This was fixed #50 on master branch but not yet released.
You can try using github instead rubygems

# Gemfile
gem 'fontello_rails_converter', github: 'railslove/fontello_rails_converter'