Why i cant update my software?

Are you doing this: https://support.apple.com/en-us/HT204204 and see if this helps: https://discussions.apple.com/docs/DOC-250003031

Make sure you:

• Are using a WiFi connection (not a hotspot).

• Have your battery charged at least 50%.

• Are not using a VPN connection.

• Do not have power save mode turned on.