Errors trying to start example from sim2real-ur-gym-gazebo

[wltjr]

Unable to run the example command due to some missing xml file or other

root@ws:/opt/ros_ws# roslaunch ur_gazebo ur5_with_gripper_bringup.launch
... logging to /root/.ros/log/24bd491e-3cca-11ef-b08a-f46b8cc5c361/roslaunch-ws-29205.log
Checking log directory for disk usage. This may take a while.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

RLException: while processing /opt/ros_ws/install/share/ur_gazebo/launch/inc/load_ur5.launch.xml:
while processing /opt/ros_ws/install/share/ur_gazebo/launch/inc/load_ur5_gripper_imr_cell.launch.xml:
Invalid roslaunch XML syntax: [Errno 2] No such file or directory: '/opt/ros_ws/install/share/ur_gazebo/launch/inc/load_ur5_gripper_imr_cell.launch.xml'
The traceback for the exception was written to the log file