Chief Delphi - Unexpected Error when Running Robot Code

Hello,

After trying to clean up my code utilizing an IO class with static instances of all my objects, I am running into a few problems.

When I upload the robot code and enable, I get this error in the driver station:

Code:

ERROR Unhandled exception: java.lang.ExceptionInInitializerError at [org.usfirst.frc.team4159.robot.IO.<clinit>(IO.java:15), org.usfirst.frc.team4159.robot.Robot.teleopInit(Robot.java:58), edu.wpi.first.wpilibj.IterativeRobot.startCompetition(IterativeRobot.java:142), edu.wpi.first.wpilibj.RobotBase.main(RobotBase.java:234)]

Here is the code referenced first in the error: (line 15 is the line is where OctoDrive is instantiated)

Code:

package org.usfirst.frc.team4159.robot;



import edu.wpi.first.wpilibj.DigitalInput;

import edu.wpi.first.wpilibj.I2C;

import edu.wpi.first.wpilibj.Joystick;

import edu.wpi.first.wpilibj.networktables.NetworkTable;



public class IO {

        public static Joystick leftStick = new Joystick(1);                           //Joystick Declaration

        public static Joystick rightStick = new Joystick(2);

        public static Joystick secondaryStick = new Joystick(3);

        

        private static DriveWheels wheelSet = new DriveWheels(0, 1, 2, 3);                          //Drivetrain Declarations

        private static DrivePistons pistonSet = new DrivePistons(0, 1, 2, 3);                  

        public static OctoDrive mainDrive = new OctoDrive(wheelSet, pistonSet);

        static {

                mainDrive.octoShift(true);

                mainDrive.invertMotor("rearRight", true);

            mainDrive.invertMotor("frontRight", true);

            mainDrive.invertMotor("leftSide", true);

        }

        

        public static ToteLifter elevator = new ToteLifter(4, 5);                                          //ToteLifter Declarations

        public static DigitalInput lowLimit = new DigitalInput(8);

        public static DigitalInput highLimit = new DigitalInput(9);

        static {

                elevator.setHighLow(lowLimit, highLimit);

        }

        

        public static GyroManager mainGyro = new GyroManager(new gyroSampler          //Gyro Declaration

                                (new GyroITG3200(I2C.Port.kOnboard)));

        

        

        public static NetworkTable imageValues;                                                                                          //RoboRealm NetworkTable Declaration

        static {

                imageValues = NetworkTable.getTable("");

        }

        public static DigitalInput toteSensor = new DigitalInput(10);

        

}

Is there something I am doing wrong here? All the people I am asking are saying that it looks fine.

Thanks in advance!