Version 3.1.x library all fail to load GUI

I have the latest Android app and I use Arduino IDE from Windows store.
I made a simple sketch with 1 button that sets pin 13 to HIGH so it will light up the LED on the Arduino board.
I am using HC-06 Bluetooth on a Arduino UNO or Arduino Pro mini. Bluetooth is connected using REMOTEXY_MODE__HARDSERIAL and REMOTEXY_SERIAL_SPEED 9600.

If I compile/upload with any of the 2.4.x libraries, it works great. I connect to BT and it downloads the GUI (with 1 button) to the phone. The button works properly by lighting up the LED. Yes, I unplug the USB and use external power.

When I compile/upload with any of the 3.1.x libraries, it fails. Yes, I tried them all up to 3.1.12  I seems to connect to the BT, but fails to download the GUI to the phone. I have seen people posting the same problem on the forum, but I have not seen any solution. Please help!!!

App version 4.13.10,API28
Device started
Bluetooth connection started
Connecting to Bluetooth device xx:xx:xx:xx:xx:xx:
Bluetooth device connected
Receiving GUI configuration
Read timeout error
Receiving GUI configuration, try 2...
Read timeout error
Receiving GUI configuration, try 3...
Read timeout error
Receiving GUI configuration, try 4...
Read timeout error
Board not reply.
Disconnect