ImportError: dynamic module does not define module export function (PyInit_PyKDL)

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I'm trying to run the code you can see below and after trying to import do_transform_cloud from tf2_sensor_msgs i receive an error:

Traceback (most recent call last):
  File "/media/wojtek/48ee3ba1-28bb-493d-b2ff-de733667d003/wojtek/Inz/mybot_ws-base_sensors/src/pyros/DMO.py", line 7, in <module>
    from tf2_sensor_msgs.tf2_sensor_msgs import do_transform_cloud
  File "/opt/ros/melodic/lib/python2.7/dist-packages/tf2_sensor_msgs/tf2_sensor_msgs.py", line 30, in <module>
    import PyKDL
ImportError: dynamic module does not define module export function (PyInit_PyKDL)

Ubuntu 18.04 LTS, ROS: Melodic

 #! /usr/bin/env python
import rospy
from nav_msgs.msg import Odometry
from sensor_msgs.msg import PointCloud2 as pc2
from sensor_msgs.msg import LaserScan
from laser_geometry import LaserProjection
from tf2_sensor_msgs.tf2_sensor_msgs import do_transform_cloud
#cloud_out = do_transform_cloud(cloud_in, transform)


class Laser2PC():
    def __init__(self):
        self.laserProj = LaserProjection()
        self.pcPub = rospy.Publisher ("/laserPointCloud",pc2, queue_size=1)
        self.laserSub = rospy.Subscriber ("/mybot/laser/scan",
                LaserScan, self.laserCallback)
    def laserCallback(self, data):
        cloud_out = self.laserProj.projectLaser(data)
        self.pcPub.publish(cloud_out)

def main():
    rospy.init_node('listener_extend')
    l2pc = Laser2PC()
    rospy.spin()

if __name__ == '__main__':
    main()