Unable to connect ROON ARC

UPnP is on and working on the Router. Shutdown Firewall does not help.
And Roon ARC is still not ready to connect.
Here is the log:

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


From another thread -

I do not understand. UPNP I have turned on, see picture.

Router: TP-Link AC5400 MU-MIMO Tri-Band

I didn’t find any NAT-PMP there.
If I have to add manual port forwarding or port triggering so I do not know what to enter there. see the picture 2:

Can you help me?
I’m a normal user and your app just doesn’t work!
Thanks in advance.