Thanks for reaching out to us and posting on our forums. I apologize for the issue you’re experiencing with the Plugable USB Gigabit Ethernet Adapter (https://plugable.com/products/usb2-e1000)! While we haven’t tested ourselves, we’ve had reports the Nvidia Shield line of products is compatible. From what I’ve researched, there shouldn’t be a need for additional settings changes in most circumstances, but it looks like some users have had to manually set up the connection in Settings > Network to add your network information. I apologize however, as I can’t say for certain what settings may need to be adjusted.
If after double checking the network settings things still don’t seem to work, can you try using the adapter with the laptop you mentioned? This would help eliminate the adapter hardware as a source of the issue, and if it’s working there we know we’re looking at a software or settings issue on the Shield side of things. Let me know if you have any questions, and I look forward to working with you on this issue!