Histórico de mensagens sobre webhook em pix

gente nao consigo de forma aguma registrar esse webhook

400
webhook_invalido
A URL informada respondeu com o código HTTP 400Efi\Exception\EfiException Object ( [message:protected] => A URL informada respondeu com o código HTTP 400 [string:Exception:private] => [code:protected] => 400 [file:protected] => /home/tract/htdocs/tract.digital/Controller/sdk-php-apis-efi/src/Efi/Request.php [line:protected] => 241 [trace:Exception:private] => Array ( [0] => Array ( [file] => /home/tract/htdocs/tract.digital/Controller/sdk-php-apis-efi/src/Efi/Request.php [line] => 166 [function] => handleClientException [class] => Efi\Request [type] => -> ) [1] => Array ( [file] => /home/tract/htdocs/tract.digital/Controller/sdk-php-apis-efi/src/Efi/ApiRequest.php [line] => 54 [function] => send [class] => Efi\Request [type] => -> ) [2] => Array ( [file] => /home/tract/htdocs/tract.digital/Controller/sdk-php-apis-efi/src/Efi/Endpoints.php [line] => 120 [function] => send [class] => Efi\ApiRequest [type] => -> ) [3] => Array ( [file] => /home/tract/htdocs/tract.digital/Controller/sdk-php-apis-efi/src/Efi/Endpoints.php [line] => 56 [function] => Efi\{closure} [class] => Efi\Endpoints [type] => -> ) [4] => Array ( [file] => /home/tract/htdocs/tract.digital/Controller/sdk-php-apis-efi/aplication/pix/webhooks/pixConfigWebhook.php [line] => 36 [function] => __call [class] => Efi\Endpoints [type] => -> ) ) [previous:Exception:private] => [error:Efi\Exception\EfiException:private] => webhook_invalido [errorDescription:Efi\Exception\EfiException:private] => A URL informada respondeu com o código HTTP 400 )