Error SSL Foreman-Proxy

Hi,

I can't change values in nodes parameters and provisioning new machines.

Show me error in port 8443 SSL

ProxyAPI::ProxyException
ERF12-4395 [ProxyAPI::ProxyException]: Unable to retrieve DHCP entry for
00:50:56:9c:4d:56 ([RestClient::BadRequest]: 400 Bad Request) for proxy
https://machine.local:8443/dhcp

lib/proxy_api/dhcp.rb:53:in rescue in record' lib/proxy_api/dhcp.rb:43:inrecord'
lib/net/dhcp/record.rb:42:in conflicts' lib/net.rb:24:inconflicting?'
app/models/concerns/orchestration/dhcp.rb:140:in dhcp_conflict_detected?' app/models/concerns/orchestration.rb:47:invalid?'
app/models/concerns/foreman/sti.rb:29:in save_with_type' app/controllers/hosts_controller.rb:113:inblock in update'
app/models/taxonomy.rb:52:in block in no_taxonomy_scope' app/models/taxonomy.rb:59:inblock (2 levels) in as_taxonomy'
app/models/concerns/foreman/thread_session.rb:148:in as_location' app/models/taxonomy.rb:58:inblock in as_taxonomy'
app/models/concerns/foreman/thread_session.rb:113:in as_org' app/models/taxonomy.rb:57:inas_taxonomy'
app/models/taxonomy.rb:51:in no_taxonomy_scope' app/controllers/hosts_controller.rb:105:inupdate'
app/models/concerns/foreman/thread_session.rb:33:in clear_thread' lib/middleware/catch_json_parse_errors.rb:9:incall'

If i access URL direct in my browser show me this error:

No client SSL certificate supplied

I find the solutions but can't see nothing.

Tks!