/usr/share/gems/gems/json-1.7.7/lib/json/common.rb:155:in `initialize': no implicit conversion of nil into String (TypeError) from /usr/share/gems/gems/json-1.7.7/lib/json/common.rb:155:in `new' from /usr/share/gems/gems/json-1.7.7/lib/json/common.rb...
