"rosbot_control/rosbot_class.h" file not found, same with <ros/ros.h>

As you can see, even after catkin_make and source devel/setup.bash the IDE is showing error messages all over the place.
“rosbot_control/rosbot_class.h” file not found etc

Could you please advise how to reset the whole system to original configurations?

I see im not the only one that has faced this issue but I still dont see a clear way to fix it:

https://get-help.robotigniteacademy.com/t/error-in-cpp-file-ros-ros-h-not-found/5584