Make sure your internet connection is stable while updating. If you haven't already done so, try a restart on your internet modem by plugging it out for a minute and plugging it back in.
I did try to do that by restarting my modem but nothing happened. I didnt specifically unplug it but i restarted it using the button is it necessary to unplug ?
Have you tried using a different IP address, such as temporarily patching with a VPN or through your mobile hotspot?