Whether it be code or deployment, this is how you get it working. Use the example code off of GRIP’s GitHub page (https://github.com/WPIRoboticsProjects/GRIP/wiki/Tutorial:-Run-GRIP-from-a-CPP-or-Java-FRC-program), not ScreenStepsLive. GRIP deploy is clearly buggy, so FTP-ing into the RIO and dropping the opencv-frc jar from %appdata%/local/whatever_grips_folder_is_called and your .grip file into the /home/lvuser folder worked for us. In the code targets/area is just area or centerX etc for us.
private final NetworkTable grip = NetworkTable.getTable("grip");
is actually
private final NetworkTable grip = NetworkTable.getTable("GRIP/myContoursReport");
for us.