Why am i getting error occurred 3014?

First, On a Mac with macOS Catalina 10.15 or later, make sure your Mac is up to date. If you have a Mac with macOS Mojave 10.14 or earlier, or a PC, make sure you have the latest version of iTunes.

Otherwise, see Apple's page on the error code - If you see Error 3014 when restoring iPhone - Apple Support

Try restoring or updating on another computer with a different internet connection. This helps to make sure there aren't any issues with your computer that are stopping it from communicating with the update server.

Errors 1639, 3000-3020 and 3100-3999 (with the exception of 3194) are sometimes caused by your network settings. If your computer uses a managed network, refer to your network administrator. Proxies, firewalls and other network security measures can cause these errors. If necessary, use a different network connection to restore the device. For example, if you're using the network connection at work, try restoring at home or on a friend's computer and network instead.

iOS update and restore errors - Apple Support

If you see Error 3194, Error 17, or 'This device isn't eligible for the requested build' on your computer - Apple Support