Seeking assistance setting up traefik with wireguard server

I'm hoping someone can help me figure out what I'm doing wrong.

I have a VM on my local network that has Traefik, 2 apps (whomai and myapp), and wireguard in server mode (let's call this VM "server"). I have another VM on the same network with Traefik and wireguard in client mode (let's call this VM "client").

• both VMs can can ping each other using their VPN IP addresses
• wireguard successfully handshakes
• I have myapp.mydomain.com as a host override on my router so every computer in my house points it to "client"
• when I run curl -L --header 'Host: myapp.mydomain.com' from the myapp container it successfully returns the myapp page.

But when I browse to http://myapp.mydomain.com I get "Internal Server Error", yet nothing appears in the docker logs for any app (neither traefik container, neither wireguard container, nor the myapp container).

Any suggestions/assistance would be appreciated!