Click Element if displayed using Selenium and Python

[giaco__mar]

Hi guys, I'm coding a script in which, when a button is clicked, sometimes a div appears and others it doesn't.
I'm trying to handle this exception using the following code

for i, j  in zip(range(160), tag):

    if i%10  == 0:
      url_to_search = "https://www.instagram.com/explore/tags/" + j + "/"
      driver.get(url_to_search)
      element = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR, ".v1Nh3.kIKUG._bz0w")))
      element.click() #Click prima foto

      element = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR, ".oW_lN._0mzm-.sqdOP.yWX7d")))
      element.click() #Click follow
      
      checkFo = driver.find_element_by_class_name(".aOOlW.HoLwm")

      if checkFo.is_displayed():
          checkFo.click
          
      else:
          element = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR, ".HBoOv.coreSpriteRightPaginationArrow")))
          element.click() #Click arrow

    else:
          element = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR, ".oW_lN._0mzm-.sqdOP.yWX7d")))
          element.click() #Click follow
          
          if checkFo.is_displayed():
              checkFo.click
          
          else:
              element = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR, ".HBoOv.coreSpriteRightPaginationArrow")))
              element.click() #Click arrow
              
          time.sleep(3)

But it doesn't work! The shell gives me this error:

Unable to locate element: {"method":"class name","selector":".aOOlW.HoLwm"}

Can anybody help me?