IndexError at cv2.minAreaRect(contours[0])

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I keep getting an IndexError at cv2.minAreaRect and my screen only displays a white screen. I'm new to python (java developer) I have absolutely no idea what's going on. Some help would be greatly appreciated!

Code is running on a Raspberry Pi3 connecting to an IP Camera. Can successfully connect to camera via browser. Also I'm trying to detect the green color range so no idea how HSV ranges work.

PS: Sorry about the ugly formatting, pasting from eclipse to here breaks everything. I can't post a pastebin link either.

#imports
import cv2
import numpy as np
import time
import argparse
import array
from collections import deque
from networktables import NetworkTables

#NetworkTables information
NetworkTables.initialize(server='OPENCV.ORG WONT LET ME DO IP')
Table = NetworkTables.getTable("table")
array.array('i')

cap = cv2.VideoCapture('OPENCV.ORG WONT LET ME DO IP')

while(True):
    try:
    # Capture frame-by-frame
        ret, frame = cap.read()

    #set color to HSV
        gray = cv2.cvtColor(frame,cv2.COLOR_BGR2HSV);

    #set color range
        greenLower = (120, 100, 100) #adjust as needed
        greenUpper = (109, 48, 89)

    #set color range
        bin = cv2.inRange(gray, greenLower, greenUpper)

    #Our operations on the frame come here
        bin = cv2.dilate(bin, None)  # fill some holes
        bin = cv2.dilate(bin, None)
        bin = cv2.erode(bin, None)   # dilate made our shape larger, revert that
        bin = cv2.erode(bin, None)
        bin, contours, hierarchy = cv2.findContours(bin, cv2.RETR_LIST, cv2.CHAIN_APPROX_SIMPLE)

        #find box coordinates, if break add while
        rc = cv2.minAreaRect(contours[0])
        box = cv2.boxPoints(rc)
        for p in box: 
            pt = (p[0],p[1])
            cv2.circle(ret,pt,5,(200,0,0),2)

        #Display the resulting frame
        cv2.imshow('frame',bin) #shows the frame to screen
        if cv2.waitKey(1) & 0xFF == ord('q'): #if 'q' key is pressed, end feed
            break

    except IndexError:
        print("No Contours Found")

#safely end code sequence
cap.release()
cv2.destroyAllWindows()