Error -50 when updating IOS software

Hi,

If you still can't install the latest version of iOS or iPadOS, try downloading the update again: Go to Settings > General > [Device name] Storage. ... Tap the update, then tap Delete Update. Go to Settings > General > Software Update and download the latest update.

Thanks and Best Regards:

[Link Edited by Moderator]

Have you tried Settings, General, Software Updates and update there?

You need wifi and the phone on charge.