Redmine

Hi all,

My server was down tonight, and when I restart it, Redmine was down...

Here is my error :

/!\ FAILSAFE /!\  Wed Jun 08 09:46:44 +0200 2016
  Status: 500 Internal Server Error
  private method `split' called for nil:NilClass
    /usr/lib/ruby/vendor_ruby/action_controller/request.rb:337:in `query_string'
    /usr/lib/ruby/vendor_ruby/rack/request.rb:163:in `GET'
    /usr/lib/ruby/vendor_ruby/action_controller/request.rb:426:in `query_parameters'
    /usr/lib/ruby/vendor_ruby/action_controller/request.rb:385:in `parameters'
    /usr/lib/ruby/vendor_ruby/action_controller/base.rb:1290:in `assign_shortcuts'
    /usr/lib/ruby/vendor_ruby/action_controller/base.rb:527:in `process_without_filters'
    /usr/lib/ruby/vendor_ruby/action_controller/filters.rb:606:in `process'
    /usr/lib/ruby/vendor_ruby/action_controller/rescue.rb:65:in `call_with_exception'
    /usr/lib/ruby/vendor_ruby/action_controller/dispatcher.rb:90:in `dispatch'
    /usr/lib/ruby/vendor_ruby/action_controller/dispatcher.rb:121:in `_call'
    /usr/lib/ruby/vendor_ruby/action_controller/dispatcher.rb:130:in `build_middleware_stack'
    /usr/lib/ruby/vendor_ruby/active_record/query_cache.rb:29:in `call'
    /usr/lib/ruby/vendor_ruby/active_record/query_cache.rb:29:in `call'
    /usr/lib/ruby/vendor_ruby/active_record/connection_adapters/abstract/query_cache.rb:34:in `cache'
    /usr/lib/ruby/vendor_ruby/active_record/query_cache.rb:9:in `cache'
    /usr/lib/ruby/vendor_ruby/active_record/query_cache.rb:28:in `call'
    /usr/lib/ruby/vendor_ruby/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call'
    /usr/lib/ruby/vendor_ruby/action_controller/string_coercion.rb:25:in `call'
    /usr/lib/ruby/vendor_ruby/rack/head.rb:9:in `call'
    /usr/lib/ruby/vendor_ruby/rack/methodoverride.rb:24:in `call'
    /usr/lib/ruby/vendor_ruby/action_controller/params_parser.rb:15:in `call'
    /usr/lib/ruby/vendor_ruby/action_controller/session/cookie_store.rb:99:in `call'
    /usr/lib/ruby/vendor_ruby/action_controller/failsafe.rb:26:in `call'
    /usr/lib/ruby/vendor_ruby/rack/lock.rb:15:in `call'
    /usr/lib/ruby/vendor_ruby/action_controller/dispatcher.rb:106:in `call'
    /usr/lib/ruby/1.8/phusion_passenger/rack/request_handler.rb:92:in `process_request'
    /usr/lib/ruby/1.8/phusion_passenger/abstract_request_handler.rb:207:in `main_loop'
    /usr/lib/ruby/1.8/phusion_passenger/railz/application_spawner.rb:418:in `start_request_handler'
    /usr/lib/ruby/1.8/phusion_passenger/railz/application_spawner.rb:358:in `handle_spawn_application'
    /usr/lib/ruby/1.8/phusion_passenger/utils.rb:184:in `safe_fork'
    /usr/lib/ruby/1.8/phusion_passenger/railz/application_spawner.rb:354:in `handle_spawn_application'
    /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:352:in `__send__'
    /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:352:in `main_loop'
    /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:196:in `start_synchronously'
    /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:163:in `start'
    /usr/lib/ruby/1.8/phusion_passenger/railz/application_spawner.rb:213:in `start'
    /usr/lib/ruby/1.8/phusion_passenger/spawn_manager.rb:262:in `spawn_rails_application'
    /usr/lib/ruby/1.8/phusion_passenger/abstract_server_collection.rb:126:in `lookup_or_add'
    /usr/lib/ruby/1.8/phusion_passenger/spawn_manager.rb:256:in `spawn_rails_application'
    /usr/lib/ruby/1.8/phusion_passenger/abstract_server_collection.rb:80:in `synchronize'
    /usr/lib/ruby/1.8/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
    /usr/lib/ruby/1.8/phusion_passenger/spawn_manager.rb:255:in `spawn_rails_application'
    /usr/lib/ruby/1.8/phusion_passenger/spawn_manager.rb:154:in `spawn_application'
    /usr/lib/ruby/1.8/phusion_passenger/spawn_manager.rb:287:in `handle_spawn_application'
    /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:352:in `__send__'
    /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:352:in `main_loop'
    /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:196:in `start_synchronously'
    /usr/lib/phusion_passenger/passenger-spawn-server:61

Redmine version is 1.3.2 and ruby version is 1.8
System is Ubuntu.

Thank you for your help.