macOS Sonoma install problem

You might want to update using the safe mode to fix this

First boot your Mac in the safe mode

1. On your Mac, choose Apple menu  > Shut Down.
2. Wait for your Mac to shut down completely. A Mac is completely shut down when the screen is black and any lights (including in the Touch Bar) are off.
3. Press and hold the power button on your Mac until “Loading startup options” appears.
4. Select a volume.
5. Press and hold the Shift key, then click Continue in Safe Mode.
6. The computer restarts automatically. When the login window appears, you should see “Safe Boot” in the menu bar.

When booted into the safe mode, go to system settings>general>software update like you usually do when trying to update. See if the update will continue this way.