I am attempting to set up my rpi3b to share an internet connection from wifi to the ethernet port. I followed some instructions found here:
Specifically, I used the script posted by Arpit Agarwal, from the first answer under the subhead "Updated for Raspbian Stretch". After following these instructions, I found that the machine I was trying to connect to the pi was successfully able to establish a connection. There was no internet access, however. Puzzled, I looked to the Raspberry Pi and found that where there would normally be a dropdown menu for wifi in the GUI, there was a new icon with the message "No wireless interfaces found."
I have updated/upgraded the device to make sure everything is up to date (before this problem ensued), and I have done my best to reverse what I did, but the problem persists. Any advice on what might have gone wrong and how I should tackle this issue would be greatly appreciated.