Frontiers not getting detected

[phoenixrider12]

@hasauino @svdeepak99
I am trying to use this package on a real robot with ROS melodic but global_detector and local_detector are not publishing anything on topic /detected_points. For every iteration in the main loop, the value of the variable "checking" is coming out to be 0 and sometimes 1 in between but never -1. I have also tried increasing and decreasing the values of eta and Geta by 4 times but it's not making any difference. What is the reason for that?
Here is the rqt_graph