cron rake cleanup:sessions error

Received this in email today:

rake aborted!
404 Resource Not Found
/srv/leap/webapp/vendor/bundle/ruby/1.9.1/gems/rest-client-1.6.7/lib/restclient/abstract_response.rb:48:in `return!'
/srv/leap/webapp/vendor/bundle/ruby/1.9.1/gems/rest-client-1.6.7/lib/restclient/request.rb:230:in `process_result'
/srv/leap/webapp/vendor/bundle/ruby/1.9.1/gems/rest-client-1.6.7/lib/restclient/request.rb:178:in `block in transmit'
/srv/leap/webapp/vendor/bundle/ruby/1.9.1/gems/rest-client-1.6.7/lib/restclient/request.rb:172:in `transmit'
/srv/leap/webapp/vendor/bundle/ruby/1.9.1/gems/rest-client-1.6.7/lib/restclient/request.rb:64:in `execute'
/srv/leap/webapp/vendor/bundle/ruby/1.9.1/gems/rest-client-1.6.7/lib/restclient/request.rb:33:in `execute'
/srv/leap/webapp/vendor/bundle/ruby/1.9.1/gems/couchrest-1.1.3/lib/couchrest/rest_api.rb:94:in `execute'
/srv/leap/webapp/vendor/bundle/ruby/1.9.1/gems/couchrest-1.1.3/lib/couchrest/rest_api.rb:45:in `get'
/srv/leap/webapp/vendor/bundle/ruby/1.9.1/gems/couchrest-1.1.3/lib/couchrest/database.rb:82:in `get'
/srv/leap/webapp/vendor/bundle/ruby/1.9.1/gems/couchrest_session_store-0.2.1/lib/couchrest/session/store.rb:42:in `find_by_expires'
/srv/leap/webapp/vendor/bundle/ruby/1.9.1/gems/couchrest_session_store-0.2.1/lib/couchrest/session/store.rb:33:in `expired'
/srv/leap/webapp/core/lib/tasks/leap_web_core_tasks.rake:17:in `block (2 levels) in '
Tasks: TOP => cleanup:sessions
(See full trace by running task with --trace)

(from redmine: created on 2013-12-06, closed on 2013-12-22)