Are you trying to update through Radeon Software or downloading the driver package directly from AMD? I would try the latter option if you keep encountering the error. Unless there is a problem with your NIC or its driver than I wouldn't know how to troubleshoot the actual installer software.
You could also make sure that you're Firewall or AV software isn't blocking access.
I formatted.. re-Installed.. Problem solved!
All my important stuff is on an alt drives.
It is faster to re-INSTALL than wait for answers or mess with it forever.
Newest ver. of Radeon RX 570 went on fine with clean fdisk/format and right after MB drivers first.
Motherboard > Video
Point being.. They'll work out the bugs by the time I need to update things again and this err will be a moot point!
Ya think? kek