Maybe, if it has to do with the action chains, you can just do it like this:from selenium.webdriver.common.keys import Keys
body = browser.find_element_by_css_selector('body')body.send_keys(Keys.PAGE_DOWN)
Hope it works!
I had to click on the body for the Keys.PAGE_DOWN to work but didn't need to use the action chain:
from selenium.webdriver.common.keys import Keysbody = driver.find_element_by_css_selector('body')body.click()body.send_keys(Keys.PAGE_DOWN)