Help setting up Arc

Roon Core Machine

IOS Mac Mini M1 2020 16gb

Networking Gear & Setup Details

ATT Gateway BGW320-505, Orbi RBR850 Router, Ethernet, no VPN

Connected Audio Devices

McIntosh MX160, USB
Auralic Airies, USB
B&W Formation Duo, Wifi
Marantz 8012, Ethernet

Number of Tracks in Library

58K

Description of Issue

I cannot figure out how to enable ARC. I have tried auto discovery and port forwarding using port 55000. I keep getting this error:

{
“connectivity”: {“status”:“NetworkError”,“status_code”:504,“error”:“error: Error: ETIMEDOUT, response code: undefined, body: undefined connected? undefined”},
“external_ip”: {“actual_external_ip”:“71.156.77.172”,“router_external_ip”:null},
“natpmp_autoconfig”: {“status”:“NotFound”},
“upnp_autoconfig”: {“server_ip”:“10.0.0.1”,“found_upnp”:true,“error”:“<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/\” s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/\“><s:Body><s:Fault>s:ClientUPnPError<UPnPError xmlns="urn:schemas-upnp-org:control-1-0">501ActionFailed</s:Fault></s:Body></s:Envelope>”}
}