can not launch node of type [robot_pose_ekf/robot_pose_ekf]: cannot locate node of type [robot_pose_ekf] in package [robot_pose_ekf]

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I am running Melodic in Ubuntu 18.04 in a VM.

I tried uninstalling and the reinstalling the package from the git (as found in the documentation), but ran into the same error. I was able to build the package using rosbuild and build the workspace using catkin_make_isolated

When I run the command: roslaunch robot_pose_ekf robot_pose_ekf.launch I get the following as my output:

parallels@parallels:~/autorobot_ws$ roslaunch robot_pose_ekf robot_pose_ekf.launch 
... logging to /home/parallels/.ros/log/3b031c06-9019-11ea-a883-001c42bcca12/roslaunch-parallels-7626.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.

started roslaunch server http://parallels:40787/

SUMMARY
========

PARAMETERS
 * /robot_pose_ekf/base_footprint_frame: base_footprint
 * /robot_pose_ekf/freq: 30.0
 * /robot_pose_ekf/imu_used: True
 * /robot_pose_ekf/odom_used: True
 * /robot_pose_ekf/output_frame: odom_combined
 * /robot_pose_ekf/sensor_timeout: 1.0
 * /robot_pose_ekf/vo_used: True
 * /rosdistro: melodic
 * /rosversion: 1.14.5

NODES
  /
    robot_pose_ekf (robot_pose_ekf/robot_pose_ekf)

ROS_MASTER_URI=http://localhost:11311

ERROR: cannot launch node of type [robot_pose_ekf/robot_pose_ekf]: Cannot locate node of type [robot_pose_ekf] in package [robot_pose_ekf]. Make sure file exists in package path and permission is set to executable (chmod +x)
No processes to monitor
shutting down processing monitor...
... shutting down processing monitor complete

I then ran rosrun robot_pose_ekf wtf.py as per some advice as suggested in the troubleshooting guide. I got the following as my output:

Traceback (most recent call last):
  File "/home/parallels/autorobot_ws/src/robot_pose_ekf/scripts/wtf.py", line 4, in <module>
    from robot_pose_ekf.srv import GetStatus, GetStatusRequest
ImportError: No module named robot_pose_ekf.srv