@Kevin_Z issue started before the upgrade to the latest firmware. Now it can't connect to the internet at all. To rule out service provider errors, I connected the old router that the ISP had given...

@Eliasar I am facing the same issue on AX1800. Have you resolved the issue? Do you mind sharing the solution? My ISP is AussieBroadband AX1800 Router: Hardware Version : Archer AX20 v2.0 Firmware...