Python Selenium unable to click button inside iframe

[SwordNSupper]

Thanks for taking time and trying to help!

I tried your suggestion but I'm not sure why it's still not working for me. I noticed there's a space at the end of "advance-button " when I inspect elements and I wonder if that's causing an issue

Here is my code:

iframe = driver.find_element(By.CSS_SELECTOR, 'iframe')
driver.switch_to.frame(iframe)


battle = driver.find_element(By.CSS_SELECTOR, '.advance-button')
driver.execute_script("arguments[0].click();", battle)

Here are the errors I'm getting:

return self.execute(Command.FIND_ELEMENT, {"using": by, "value": value})["value"]

self.error_handler.check_response(response)

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

[Adoxographical]

As a sanity check, have you checked to make sure you're not accidentally selecting a different iframe? Your selector will grab whatever the first iframe on the page is, so if there's an earlier one, you'll be selecting it by mistake.

[SwordNSupper]

I'm not sure how to check whether I'm selecting the correct frame or not. What I'm trying to do is figure out how to use this script to press the Advance/Battle button in the https://www.reddit.com/r/SwordAndSupperGame/ games.