@sagar002100 Use this. this site have always latest firmware. https://www.tp-link.com/en/support/download/er605/v2/#Firmware

@Plankton82 Check the firewall on the PC. make sure that the network card is not set to public, it sometimes switches to public by itself.

@Hutchy If you haven't done so, try restarting everything. I've run into weird problems that have been solved by restarting everything in the past.

@MR.S 6 Ghz is frequency/channel WiFi 6 is a Wifi standard that has nothing to do with each other. On your access points, you only have 2.4 and 5 Ghz radios, but you are not the first to have...

@ZoloNN in such a situation, I sort by uptime, then I quickly find the device I'm looking for, then I give the device a name so that I don't have to look for it later.

@Jeesoon1 to connect to 6 Ghz you must have access points that support 6 Ghz, as far as I can see you don't