I found a XieGu G90S on some used goods website (like Xianyu). When I connected it to my computer and tried using FT8 with the control cable, I kept getting an error message saying "connection timeout." I tried everything: replacing the cable, replacing the computer, updating drivers, changing software, and even replacing DLL files. Finally, after contacting technical support at "Tian Kong," they were able to resolve the issue by flashing a new firmware version. Here's the information about the problematic firmware version:

This is problematic.