I am running ruby 2.3.1, and following the example from
https://github.com/rubycas/rubycas-server/wiki/Quick-Start, and I am getting following error. I didn't find any solution after doing a bunch of search online, though saw many reports of the same issue from others. Is there a solution/workaround for this?
bundle exec rubycas-server -c ./config.yml
=> Using custom config file "./config.yml"
/usr/local/rvm/gems/ruby-2.3.1/gems/r18n-core-1.1.11/lib/r18n-core/yaml_methods.rb:34:in `detect_yaml_private_type': uninitialized constant Psych::ENGINE (NameError)
from /usr/local/rvm/gems/ruby-2.3.1/gems/r18n-core-1.1.11/lib/r18n-core/yaml_loader.rb:42:in `initialize'
from /usr/local/rvm/gems/ruby-2.3.1/gems/r18n-core-1.1.11/lib/r18n-core.rb:160:in `new'
from /usr/local/rvm/gems/ruby-2.3.1/gems/r18n-core-1.1.11/lib/r18n-core.rb:160:in `<module:R18n>'
from /usr/local/rvm/gems/ruby-2.3.1/gems/r18n-core-1.1.11/lib/r18n-core.rb:40:in `<top (required)>'
from /usr/local/rvm/gems/ruby-2.3.1/gems/sinatra-r18n-1.1.11/lib/sinatra/r18n.rb:22:in `<top (required)>'
from /home/sdx-user/rubycas-server/lib/casserver/base.rb:2:in `<top (required)>'
from /home/sdx-user/rubycas-server/lib/casserver/server.rb:3:in `<top (required)>'
from /home/sdx-user/rubycas-server/lib/casserver.rb:18:in `require'
from /home/sdx-user/rubycas-server/lib/casserver.rb:18:in `<top (required)>'
from /home/sdx-user/rubycas-server/bin/rubycas-server:28:in `require'
from /home/sdx-user/rubycas-server/bin/rubycas-server:28:in `<top (required)>'
from /usr/local/rvm/gems/ruby-2.3.1/bin/rubycas-server:23:in `load'
from /usr/local/rvm/gems/ruby-2.3.1/bin/rubycas-server:23:in `<main>'
from /usr/local/rvm/gems/ruby-2.3.1/bin/ruby_executable_hooks:15:in `eval'
from /usr/local/rvm/gems/ruby-2.3.1/bin/ruby_executable_hooks:15:in `<main>'
Environment
Bundler 1.13.6
Rubygems 2.5.1
Ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-linux]
GEM_HOME /usr/local/rvm/gems/ruby-2.3.1
GEM_PATH /usr/local/rvm/gems/ruby-2.3.1:/usr/local/rvm/gems/ruby-2.3.1@global
RVM 1.27.0 (latest)
Git 2.7.4
rubygems-bundler (1.4.4)