Cannot create a ROS-2 Controller Plugin

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I'm working on developing a local planner, I'm following the guidelines given in this tutorial. As per the tutorial, I created the controller added the necessary plugin and registered it as well by compiling it.

The problem now is that, when I try to test my local planner with the simulation, I get an error message as follows:

[controller_server-8] [ERROR] [1618560750.161517689] [controller_server]: FollowPath called with controller name FollowPath, which does not exist. Available controllers are FollowPath

What would be the best method to debug it ?

In case if additional files are required I could attach it.