@Zohan Post that screenshot too:

@Zohan Change your wireless settings to these and try again (your other settings are perfectly fine):

@dragonfly201270 You can try the beta FW from this thread's recommended solution and see if that helps. You can revert back to the current one if that's not helping. Make a configuration backup, just...

@Zohan You can modify the IP address of AX1500 after you have set it up in AP mode. Your observations: "I'm able to reach AX1500 on 192.268.0.254 address only when I'm connected to it via cable. I am...

@Zohan This is the topology for AP mode - cable from the main router LAN port to the AX1500 WAN/Internet port (assuming AX1500 is in AP mode). AX1500 LAN settings: Static IP: 192.168.100.3 Subnet...

That's not an issue. You can back it up at any time, since you can revert back from this beta FW. Usually before updating the FW is advisable to have a back up of the configuration, just in case.