'How do you to Install OpenBR in Ubuntu 20.04?

I've been trying to install OpenBR so I can work on some facial detection and tracking, but I've been running into an issue pretty consistently. I've been following the tutorial here and the only part that I cant get to work is the CMake command in the 3rd step. I'll have the error message below, so if you have any suggestions or recommendations I'd be more than happy to hear it.

The Error Message


  By not providing "FindOpenCV.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "OpenCV", but
  CMake did not find one.

  Could not find a package configuration file provided by "OpenCV" (requested
  version 2.4.5) with any of the following names:

      OpenCVConfig.cmake
      opencv-config.cmake

  Add the installation prefix of "OpenCV" to CMAKE_PREFIX_PATH or set
  "OpenCV_DIR" to a directory containing one of the above files.  If "OpenCV"
  provides a separate development package or SDK, be sure it has been
  installed.


Sources

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Source: Stack Overflow

Solution Source