I can not update my phone

I can not upload updates to my phone

You would not upload an update to your phone, you would download an update to your phone.

Assuming that the battery is fully charged, the battery is not set to Low Power Mode, and you have good strong Wi-Fi Internet connection, what happens when you try to update your phone?

What is the exact error message that appears?

It would really help if you could provide a screenshot of this, if possible.