@AntoninoVitalJr Hi, As far as I am aware TP-Link's Archer routers currently only support WPA-Enterprise and WPA2-Enterprise, but no WPA3-Enterprise. Whether OpenWrt is available for your AX1800...

@hlinnk Is the BE900 connected to any other networks? If so, then please unplug everything from the BE900 apart from the power cable and then try again to log into the admin webpage.

@hlinnk Hi, Have you ever been able to log into the admin webpage since you purchased the BE900? Do you have any non-Apple devices you could use to try to login? (phone, Internet-capable TV, etc.)...

@Geronimo04 Hi, Interference from USB 3.x devices is known to affect 2.4 GHz signals. Such devices mainly include external USB hard disks, USB thumb drives or flash memory card readers. So, in case...

@Killer74 I don't know about that. I thought all Archer C7 V5 "EU" would be the same.

@gipsasLTU Who knows. Maybe the TL-WPA7517 is indeed emitting a Wi-Fi signal when its Wi-Fi is switched off. Anyway, if you don't use the Wi-Fi, because you only connect via LAN port, then perhaps...