The SABnzbd queue never loads and I've check the usual settings:

In App:
IP Address: Correct
Test Connection Button: Success
Restart: Tried

On PC:
Firewall: No blocked connections
Sab: Running on normal port
Restart: Tried
Version of SABnzbd running?

The queue is visible when you navigate to the webpage of SABnzbd?

This is when you are on the LAN or external to your network?