Error 1

Error message

selenium.common.exceptions.InvalidArgumentException: Message: invalid argument: invalid locator

solution

driver.find_element("class_name", "AAA").click() ❌
🔽
from selenium.webdriver.common.by import By
driver.find_element(By.CLASS_NAME, "AAA").click() ✅

참고
https://stackoverflow.com/questions/71097378/selenium-common-exceptions-invalidargumentexception-message-invalid-argument

Error 2

Error message

selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"css selector","selector":".A A A"}

solution

driver.find_element(By.CLASS_NAME, "A A A").click() ❌
🔽
driver.find_element(By.CLASS_NAME, "A.A.A").click() ✅

참고
https://zeuskwon-ds.tistory.com/67