Windows 10 Hyper-V -> Ubuntu Server - Cannot Register GitHub App

[Fefe-Hern]

I wanted to try out Dokploy on a Windows 10 Hyper-V (gen 2) instance. I've enabled a bridge network switch via:

• Creating a new Virtual Switch
• Connecting it to normal network & allowing the OS to share this network adapter
• Giving it a static local IP

I'm using Ubuntu Server, can confirm that ufw is inactive. I'm able to change distros if needed.
I was able to set up Dokploy, but upon trying to add a GitHub App I get the following URL
http://192.168.x.x:port/api/redirect?authId={AuthID}&code={code}&state=gh_init%{hash}-

When GitHub is trying to redirect me to this URL (or I paste it myself into the browser), eventually I get Internal Server Error.

Looking at Server Logs I see a Request Timeout error for https://api.github.com/app-manifests/{hash}/conversions.

I assume I'm missing some setting to allow a callback for this request?