Histórico de mensagens sobre pix em devs

Preciso criar a chave PIX para geração das cobranças.

Bom dia!
Estou realizando alguns testes nos modelos que disponibilizam, mas está apresentando erros.

Criação de chaves homologação erro 500 Produção Funciona

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erro_interno_servidor
Erro interno do servidor
500
Warning: curl_setopt_array(): Cannot represent a stream of type Output as a STDIO FILE in D:\xampp\htdocs\app_cobranca\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php on line 70

Warning: curl_setopt_array(): Cannot represent a stream of type Output as a STDIO FILE in D:\xampp\htdocs\app_cobranca\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php on line 70

Warning: curl_setopt_array(): Cannot represent a stream of type Output as a STDIO FILE in D:\xampp\htdocs\app_cobranca\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php on line 70
cURL error 0: The cURL request was retried 3 times and did not succeed. The most likely reason for the failure is that cURL was unable to rewind the body of the request and subsequent retries resulted in the same error. Turn on the debug option to see what went wrong. See https://bugs.php.net/bug.php?id=47204 for more information. (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://pix-h.api.efipay.com.br/v2/gn/evp