Did you find a resolution?
I just received my AM5 and I am getting the same "Get Data Failed" error on the Firmware tab exactly like the screenshots above.
I was able to download 1.3.0 Mount firmware (from the link on this forum) and upgraded that manually using ASCOM on a PC which was successful. But, the Hand Controller firmware is still 2.1 as reported by the AM5 Hand Controller Manager in the AM5 Mount App.
Tried opening port 4040 on my router to the IP of the WLAN IP under the Home tab. After restarting everything (mount/app) the Firmware Tab still reports "Get Data Failed" for both the Mount and the Hand Controller.
Thanks!