When Apple servers cannot be connected, Error 3194 occurs. Your computer's hosts file has something to do with how it connects to the Internet. It's conceivable that a file misconfiguration is causing the issue, and that updating the file would solve it. This is what you must do:
- Turn off iTunes.
- Go to your host's file and open it.
- Launch the Terminal software on your iPhone SE, type Sudo nano /private/etc/hosts, and press Return.