cURL error 7: Failed to connect

Hello,

I use Laravel Http client to send a request to a server on metaverse Second Life with an object in which I set an Http server. When I test a simple GET url on a browser all is OK, idem when I use a POST request with a REST app. But when I use Laravel Http Client (with simple Http:get(...)) I get this issue:

Illuminate\Http\Client\ConnectionException
cURL error 7: Failed to connect to simhost-016abbfc19377d6a6.agni.secondlife.io port 12046: Connection refused (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for http://simhost-016abbfc19377d6a6.agni.secondlife.io:12046/cap/49561c34-45f8-1f86-bf4e-292749a80acc 

When I check request I get this :

Illuminate\Http\Client\Request {#1269 ▼
  #request: GuzzleHttp\Psr7\Request {#1260 ▼
    -method: "GET"
    -requestTarget: null
    -uri: GuzzleHttp\Psr7\Uri {#1255 ▼
      -scheme: "http"
      -userInfo: ""
      -host: "simhost-016abbfc19377d6a6.agni.secondlife.io"
      -port: 12046
      -path: "/cap/49561c34-45f8-1f86-bf4e-292749a80acc"
      -query: ""
      -fragment: ""
      -composedComponents: null
    }
    -headers: array:2 [▼
      "User-Agent" => array:1 [▼
        0 => "GuzzleHttp/7"
      ]
      "Host" => array:1 [▼
        0 => "simhost-016abbfc19377d6a6.agni.secondlife.io:12046"
      ]
    ]
    -headerNames: array:2 [▼
      "user-agent" => "User-Agent"
      "host" => "Host"
    ]
    -protocol: "1.1"
    -stream: GuzzleHttp\Psr7\Stream {#1259 ▼
      -stream: stream resource @559 ▼
        wrapper_type: "PHP"
        stream_type: "TEMP"
        mode: "w+b"
        unread_bytes: 0
        seekable: true
        uri: "php://temp"
        options: []
      }
      -size: 0
      -seekable: true
      -readable: true
      -writable: true
      -uri: "php://temp"
      -customMetadata: []
    }
  }
  #data: []
}

I dont understand why I have this cURL error. If someone has an idea...

Thanks