TMDSEMU560V2STM-U: The emulator is plugged into the computer and the computer does not recognize it.

Part Number: TMDSEMU560V2STM-U

After the emulator is plugged into the computer, the power light is red, and the mode light is flashing green,Normally, after 10S, the 2 lights are solid green.According to the manual, plugging and unplugging 10 times in a row can enter the safe mode, and this operation has not been successful.In this case, the emulator is plugged into the computer and the computer does not recognize it.What should I do?