Issues running demo [ROS melodic]

[NiambhB]

Hi,

I just tried to run the demo by following the README instructions after a fresh clone of your repo. Rviz launches fine but the terminal gives the following errors:

[odom_publisher-5] process has died [pid 9672, exit code 1, cmd /home/niambh/Documents/XOXO/project/diff_drive_ws/src/diff_drive/nodes/diff_drive_odometry __name:=odom_publisher __log:=/home/niambh/.ros/log/7bed8d5e-d016-11ea-aa71-4cbb5855c239/odom_publisher-5.log].
log file: /home/niambh/.ros/log/7bed8d5e-d016-11ea-aa71-4cbb5855c239/odom_publisher-5*.log
[diff_drive_go_to_goal-7] process has died [pid 9687, exit code 1, cmd /home/niambh/Documents/XOXO/project/diff_drive_ws/src/diff_drive/nodes/diff_drive_go_to_goal cmd_vel:=/robot/cmd_vel __name:=diff_drive_go_to_goal __log:=/home/niambh/.ros/log/7bed8d5e-d016-11ea-aa71-4cbb5855c239/diff_drive_go_to_goal-7.log].
log file: /home/niambh/.ros/log/7bed8d5e-d016-11ea-aa71-4cbb5855c239/diff_drive_go_to_goal-7*.log

Do you know why this could be happening?
I am using ROS melodic with Ubuntu 18.04.