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DRV8234EVM: Impossible to connect to development board

Part Number: DRV8234EVM

Tool/software:

Hi, I installed DRV8213-14-34EVM-GUI on windows and the first time I was able to connect to DRV8234EVM dev board. However, after disconnecting the usb and reconnecting I cannot connect to the serial port:

I don't know what else to try. When I connect the board the leds flash for some time (MCU_STATUS and GUI_STATUS) and I can see that two new COM ports appear on the computer (COM9 and COM15). But none of them work when I try to connect to them via the app