No module named 'SerialClient' on bringup

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Hello,

I'm trying to execute the bringup on a turtlebot3 but when I run the command: roslaunch turtlebot3_bringup turtlebot3_robot.launch, I get the following error:

Traceback (most recent call last):
  File "/home/ubuntu/catkin_ws/devel/lib/rosserial_python/serial_node.py", line 15, in <module>
    exec(compile(fh.read(), python_script, 'exec'), context)

  File "/home/ubuntu/catkin_ws/src/turtlebot3/rosserial/rosserial_python/nodes/serial_node.py", line 39, in <module>
    from rosserial_python import SerialClient, RosSerialServer

  File "/home/ubuntu/catkin_ws/devel/lib/python3/dist-packages/rosserial_python/__init__.py", line 34, in <module>
    exec(__fh.read())

  File "<string>", line 1, in <module>

ModuleNotFoundError: No module named 'SerialClient'

Since I am using ROS Noetic, I had to download rosserial-python by source using the command:

git clone https://github.com/ros-drivers/rosser... -b noetic-devel

And maybe this is why this isn't working. Is there any workaround to make this work well? I tried taking a look at the files that were described in the error message but I had no luck or any idea of how I could correct them. I believe that the error has to do with a confusion between Python2 and Python3 on the file serial_node.py on line 39:

from rosserial_python import SerialClient, RosSerialServer

I am trying to run this on a Raspberry Pi 3 on a turtlebot 3 waffle-pi. But I don't know what I should change to make it work. Can anyone help?

Thank you