STM32WB55 Nucleo UART Example - unknown data format on hyper terminal

Hi,

I am a new to STM32WB55 Nucleo and have just started to understand it from the examples provided by the ST. In this process, I have observed unknown data format on hyper terminal. i tried with different baudrates and all the available UART library examples but none of them resolved this issue. May i know the reason why this Board is showing unknown data format for this uart examples.

Thanks,

Suyodhana