Error when “catkin_make” is run

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I cloned a gazebo ROS package from https://github.com/YugAjmera/omni3ros... and if I try to do catkin_make, I get the following error.

I am using Gazebo 11 and ROS Noetic and i've made sure to source the shell.

Error image : https://ibb.co/kQQWtQr

I am new to ROS and Gazebo. It will be helpful if someone help me resolve this, Thanks!