Shell not working on cc2650

Hi, my name is joseph and I’m currently working on RIOT with TI sensortag cc2650 as a board. The problème that I have is that the shell on my board is not responding, my problem is similar to this https://github.com/RIOT-OS/RIOT/issues/9971 but I don’t understand how they solved it. Can someone help me?

Joseph

What example have you flashed on the board?