UR Driver Error after catkin_make (CMake Error)

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I am attempting to build the Universal Robots ROS Driver on ROS Melodic Ubuntu 18.04 (VirtualBox VM), but when I try to build the workspace with catkin_make I get the error shown below.

What should I do to solve this? Thank you

UR Driver Error after catkin_make

CMake Warning at /opt/ros/melodic/share/catkin/cmake/catkin_package.cmake:166 (message):
catkin_package() DEPENDS on 'gazebo' but neither 'gazebo_INCLUDE_DIRS' nor
'gazebo_LIBRARIES' is defined.
Call Stack (most recent call first):
/opt/ros/melodic/share/catkin/cmake/catkin_package.cmake:102 (_catkin_package)
myproject_gazebo/CMakeLists.txt:41 (catkin_package)

CMake Error at /opt/ros/melodic/share/catkin/cmake/catkin_package.cmake:305 (message):
 catkin_package() include dir 'include' does not exist relative to
 '/home/<user>/catkin_ws/src/myproject_gazebo'
 Call Stack (most recent call first):
 /opt/ros/melodic/share/catkin/cmake/catkin_package.cmake:102 (_catkin_package)
 myproject_gazebo/CMakeLists.txt:41 (catkin_package)


 -- Configuring incomplete, errors occurred!
 See also "/home/<user>/catkin_ws/build/CMakeFiles/CMakeOutput.log".
 See also "/home/<user>/catkin_ws/build/CMakeFiles/CMakeError.log".
 Makefile:3708: recipe for target 'cmake_check_build_system' failed
 make: *** [cmake_check_build_system] Error 1
 Invoking "make cmake_check_build_system" failed