Can't reload nodes if config output is http

Hi,
I use http as output in my config.
When I try to reload the nodes with http://127.0.0.1:8888/oxidized/reload, I have this error :

NoMethodError: private method `load' called for #<Oxidized::Http:0x0000561455e234d8>
        /var/lib/gems/2.5.0/gems/oxidized-0.24.0/lib/oxidized/nodes.rb:15:in `block in load'
        /var/lib/gems/2.5.0/gems/oxidized-0.24.0/lib/oxidized/nodes.rb:128:in `synchronize'
        /var/lib/gems/2.5.0/gems/oxidized-0.24.0/lib/oxidized/nodes.rb:128:in `with_lock'
        /var/lib/gems/2.5.0/gems/oxidized-0.24.0/lib/oxidized/nodes.rb:10:in `load'
        /var/lib/gems/2.5.0/gems/oxidized-web-0.11.1/lib/oxidized/web/webapp.rb:74:in `block in <class:WebApp>'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1611:in `call'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1611:in `block in compile!'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:975:in `block (3 levels) in route!'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:994:in `route_eval'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:975:in `block (2 levels) in route!'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1015:in `block in process_route'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1013:in `catch'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1013:in `process_route'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:973:in `block in route!'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:972:in `each'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:972:in `route!'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1085:in `block in dispatch!'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1067:in `block in invoke'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1067:in `catch'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1067:in `invoke'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1082:in `dispatch!'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:907:in `block in call!'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1067:in `block in invoke'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1067:in `catch'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1067:in `invoke'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:907:in `call!'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:895:in `call'
        /var/lib/gems/2.5.0/gems/rack-protection-1.5.5/lib/rack/protection/xss_header.rb:18:in `call'
        /var/lib/gems/2.5.0/gems/rack-protection-1.5.5/lib/rack/protection/path_traversal.rb:16:in `call'
        /var/lib/gems/2.5.0/gems/rack-protection-1.5.5/lib/rack/protection/json_csrf.rb:18:in `call'
        /var/lib/gems/2.5.0/gems/rack-protection-1.5.5/lib/rack/protection/base.rb:49:in `call'
        /var/lib/gems/2.5.0/gems/rack-protection-1.5.5/lib/rack/protection/base.rb:49:in `call'
        /var/lib/gems/2.5.0/gems/rack-protection-1.5.5/lib/rack/protection/frame_options.rb:31:in `call'
        /var/lib/gems/2.5.0/gems/rack-1.6.10/lib/rack/nulllogger.rb:9:in `call'
        /var/lib/gems/2.5.0/gems/rack-1.6.10/lib/rack/head.rb:13:in `call'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/show_exceptions.rb:25:in `call'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:182:in `call'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:2013:in `call'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1487:in `block in call'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1787:in `synchronize'
        /var/lib/gems/2.5.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1487:in `call'
        /var/lib/gems/2.5.0/gems/rack-1.6.10/lib/rack/urlmap.rb:66:in `block in call'
        /var/lib/gems/2.5.0/gems/rack-1.6.10/lib/rack/urlmap.rb:50:in `each'
        /var/lib/gems/2.5.0/gems/rack-1.6.10/lib/rack/urlmap.rb:50:in `call'
        /var/lib/gems/2.5.0/gems/rack-1.6.10/lib/rack/builder.rb:153:in `call'
        /var/lib/gems/2.5.0/gems/puma-3.12.0/lib/puma/configuration.rb:225:in `call'
        /var/lib/gems/2.5.0/gems/puma-3.12.0/lib/puma/server.rb:658:in `handle_request'
        /var/lib/gems/2.5.0/gems/puma-3.12.0/lib/puma/server.rb:472:in `process_client'
        /var/lib/gems/2.5.0/gems/puma-3.12.0/lib/puma/server.rb:332:in `block in run'
        /var/lib/gems/2.5.0/gems/puma-3.12.0/lib/puma/thread_pool.rb:133:in `block in spawn_thread'

If I change my config and output to a file instead of http, the reload command works again!
Could someone help me ?
Thanks
Ludo