Arc not working with Zyxel and linksys router

Networking Gear & Setup Details

Zyxel vmg3625-t50b → Linksys wrt3200acm → power line tp link spa 8630 → Roon rock nuc core

Description of Issue

I get the below error when attempting to test Roon arc via the Roon remote app. I attempted to set up port forwarding on both the zyxel and linksys routers. I also attempted to set up zyxel in bridge mode following instructions from the manufacturer but that led to the internet being cut completely. Any guidance on additional steps to try would be much appreciated.

{
“connectivity”: {“status”:“NetworkError”,“status_code”:504,“error”:“error: Error: ETIMEDOUT, response code: undefined, body: undefined connected? undefined”},
“external_ip”: {“actual_external_ip”:“136.144.35.44”,“router_external_ip”:null},
“natpmp_autoconfig”: {“status”:“NotFound”},
“upnp_autoconfig”: {“status”:“NotFound”}
}

What country are you in and what is your ISP.

I’m in Turkey and my ISP is Turknet.