tlsv1 alert protocol version

[tobit6795]

{
  "errorMessage": "HTTPSConnectionPool(host='$DOMAIN', port=443): Max retries exceeded with url: /api/alexa/smart_home (Caused by SSLError(SSLError(1, '[SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:852)'),))",
  "errorType": "SSLError",
  "stackTrace": [
    [
      "/var/task/haaska.py",
      111,
      "event_handler",
      "return ha.post('alexa/smart_home', event, wait=True)"
    ],
    [
      "/var/task/haaska.py",
      65,
      "post",
      "timeout=(None, read_timeout))"
    ],
    [
      "/var/task/requests/sessions.py",
      581,
      "post",
      "return self.request('POST', url, data=data, json=json, **kwargs)"
    ],
    [
      "/var/task/requests/sessions.py",
      533,
      "request",
      "resp = self.send(prep, **send_kwargs)"
    ],
    [
      "/var/task/requests/sessions.py",
      646,
      "send",
      "r = adapter.send(request, **kwargs)"
    ],
    [
      "/var/task/requests/adapters.py",
      514,
      "send",
      "raise SSLError(e, request=request)"
    ]
  ]
}

i checked my domain and cert with openssl

New, TLSv1.3, Cipher is TLS_AES_256_GCM_SHA384 i:C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3

and on my reverse proxy older versions are disabled, i already tried to disable ssl verify, but without success