Raspberry Pi Gives an Error

My Raspberry Pi 3 Gives an error about bluetooth. It says:“failed to start configure bluetooth modems connected by UART” What should I do?

Mon Raspberry Pi 3 Donne une erreur à propos de bluetooth. Il dit: “failed to start configure bluetooth modems connected by UART” Que dois-je faire?

Hi,
It seems the serial is misconfigured, do you use a pre-build image or did you try to install all on your own ?