Install brltty-x11 by entering the following commands in the terminal:
sudo apt update sudo apt install brltty-x11
Access software for a blind person using a braille display - X11 drivers
BRLTTY is a daemon which provides access to the Linux console (text mode) for a blind person using a braille display. It drives the braille display and provides complete screen review functionality. . This package contains optional screen drivers for BRLTTY which require X11 or GNOME.