ARC Port Forwarding Issue (Fritzbox 6490)

Sorry my English is very bad, but i cant install/konfiqure the ARC. About the last 2 Days i look at my Router ( Fritzbox 6490 ) and i cant find the failure. Please look at Kopie of Diagnostic.
{
“connectivity”: {“status”:“NetworkError”,“status_code”:504,“error”:“error: Error: ETIMEDOUT, response code: undefined, body: undefined connected? undefined”},
“external_ip”: {“actual_external_ip”:“5.147.49.227”,“router_external_ip”:“”},
“status”: “status”: MultipleNatFound
,
“natpmp_autoconfig”: {“status”:“NotFound”},
“upnp_autoconfig”: {“server_ip”:“192.168.175.1”,“found_upnp”:true}
}

What can i do?
Greetings
Rüdiger

What country and ISP are you using?

Iam living in Germany and my Internetprovider is Vodafone.
Rüdiger

You may need to ask your provider for an IP address. See here

Hi,
in have done these Instructions in many variation but it dont works. I think i call Tommorow to
vodafone.
Thanks
Rüdiger

Hallo Rüdiger,

Wenn du einen Vodafone router/modem hast solltest Du prüfen ob das Gerät auch im Bridge Mode läuft. Ansonsten hast du zwei Geräte auf denen ein NAT Service läuft, dann funktioniert das Port forwarding nicht.

Viele Grüße
Tom