Can't download latest firmware on Archer C80 v1.0
I'm running firmware 1.13.2 Build 230824 Rel.74702n(5553) on Archer C80 (hardware revision 1.0) and I can see that version 1.13.15 Build 240812 Rel.53634n(5553) is available on the firmware updates page but I can't download it or upgrade to it. It always fails to download it.
How do I upgrade to the new firmware? I run C80 in AP mode and my MacBook constantly disconnects from WiFi every few minutes. This doesn't happen with Android devices or if the MacBook is connected over Ethernet. It's just over Wi-Fi and I would like to update to the latest firmware to see if that fixes things.

