ImportError: No module named msg

[Kieran912]

Hello, I am using the Nvidia Jetson Nano board. It is based on Ubuntu 18.04. I am using ROS melodic on it.
I run this code: rosrun rosserial_python serial_node.py /dev/ttyACM0. However, I get this error.

Traceback (most recent call last):
File "/home/abcd/catkin_ws/src/rosserial/rosserial_python/nodes/serial_node.py", line 39, in
from rosserial_python import SerialClient, RosSerialServer
File "/home/abcd/catkin_ws/devel/lib/python2.7/dist-packages/rosserial_python/init.py", line 34, in
exec(__fh.read())
File "", line 1, in
File "/home/abcd/catkin_ws/src/rosserial/rosserial_python/src/rosserial_python/SerialClient.py", line 56, in
from rosserial_msgs.msg import TopicInfo, Log
ImportError: No module named msg

Please let me know if there's anything I could do.
Thanks guys.