How do I get Selenium to login to this website?

I am having trouble getting Selenium to login to Costco.com. It basically freezes at the login screen and won't proceed to the next screen. Any idea's? Thank you in advance!

from selenium import webdriver;
from selenium.webdriver.support.ui import Select;
from selenium.webdriver.common.keys import Keys;
from selenium.webdriver.common.by import By;
import time;

browser = webdriver.Chrome()
browser.get('https://www.costcobusinessdelivery.com/LogonForm?URL=%2f')

email = browser.find_element_by_css_selector('#logonId')
email.click()
email.send_keys('my_email')

password = browser.find_element_by_css_selector('#logonPassword_id')
password.click()
password.send_keys('my_password')

zipcode = browser.find_element_by_css_selector('#deliveryZipCode')
zipcode.click()
zipcode.send_keys('my_zipcode')


login = browser.find_element_by_css_selector('#sign_in_button')
login.click()