when i use this https://github.com/dawonn/vectornav.git to get connect imu to ROS

i get this error when roslaunch vectornav vectornav.launch .

and i do not know what does this error mean and how to solve it .

process[vectornav-1]: started with pid [14051] [ INFO] [1597317844.383687536]: Initializing vn200. Port:/dev/ttyUSB0 Baud:230400

terminate called after throwing an instance of 'vn::timeout' what(): timeout [vectornav-1] process has died [pid 14051, exit code -6, cmd /home/tpc/imucatkinws/devel/lib/vectornav/vn200node _name:=vectornav __log:=/home/tpc/.ros/log/baa53c58-dc79-11ea-8194-606c666e082f/vectornav-1.log]. log file: /home/tpc/.ros/log/baa53c58-dc79-11ea-8194-606c666e082f/vectornav-1*.log all processes on machine have died, roslaunch will exit shutting down processing monitor... ... shutting down processing monitor complete done