I am trying to use your roomblock github to interface with my iRobot Create 2 and RPLidar A1. I am using a Raspberry Pi 4 that is running ubuntu 16.04. When I run "roslaunch roomblock_bringup roomblock.launch" , I get this error message

No such file or directory: /home/ubuntu/create_ws/src/create_robot/create_description/urdf/create_gazebo.urdf.xacro None None

when processing file: /home/ubuntu/create_ws/src/roomblock/roomblock_description/urdf/roomba500.urdf.xacro
included from: /home/ubuntu/create_ws/src/roomblock/roomblock_description/robots/roomblock.urdf.xacro

Invalid tag: Cannot load command parameter [robot_description]: command [/opt/ros/kinetic/lib/xacro/xacro --inorder '/home/ubuntu/create_ws/src/roomblock/roomblock_description/robots/roomblock.urdf.xacro'] returned with code [2].

Param xml is
The traceback for the exception was written to the log file