Hi Kceyleb,
Thanks for reaching out to Apple Support Communities. It sounds like you're having an issue with restoring an encrypted backup. We're happy to provide some information to assist.
You started from an excellent resource About encrypted backups on your iPhone, iPad, or iPod touch It states you can make a new encrypted backup after resetting the network settings.
You can’t restore an encrypted backup without its password. With iOS 11 or later or iPadOS, you can make a new encrypted backup of your device by resetting the password.
- On your device, go to Settings > General > Transfer or Reset [Device] > Reset.
- Tap Reset Network Settings and enter your device passcode.
- Follow the steps to reset your settings. This won't affect your user data or passwords, but it will reset settings like display brightness, Home Screen layout, and wallpaper. It also removes your encrypted backup password.
- Connect your device to the Finder or iTunes again and create a new encrypted backup using the steps above."
If you've reset the network settings and the issue continues, test a normal restart of your computer. We also recommend checking to ensure iTunes is up to date. Update to the latest version of iTunes
Should the issue continue reach out to Apple Support to further assist.
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Cheers!