Selenium Python Chrome - "element not interactable"

Trying and failing to input text into the username and password text fields on this page:

I'm able to select the element but it throws the not interactable message.

I've tried:

#1

login_form = driver.find_element(By.CSS_SELECTOR, "input[id='signInFormUsername']")
login_form.send_keys('User')

#2

login_form = WebDriverWait(driver, 5).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "input[id='signInFormUsername']")))
login_form.send_keys('User')

Any other means of sending text to this element?

You have 2 login elements and first element that actually returns find_element is invisible.
So, to solve your issue, you should filter by visible elements and get first visible element from array.

login_elements = driver.find_elements(By.CSS_SELECTOR, '[name=username]')
login_input = [element for element in login_elements if element.is_displayed()][0]
login_input.send_keys('User')

Root cause: There are 2 elements with @id=signInFormUsername, you need to identify and locate the second element. Your code is trying to locate the first element, and the first element is not visible on browser, hence you are getting Element not interactable exception.

Solution: Using XPath locator strategy, use the below XPath expression to locate second element in the DOM:

(//input[@id='signInFormUsername'])[2]

Code:

login_form = WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.XPATH, "(//input[@id='signInFormUsername'])[2]")))
login_form.send_keys('User')

UPDATE: How to find if XPath expression locates one or more elements:

Press key <kbd>F12</kbd> --> Press <kbd>Ctrl + F</kbd> on console and paste the XPath expression //input[@id='signInFormUsername']. You will notice 2 results as shown in below screenshot. First one won't highlight on the desired text box, but second one will. Try it.

There are two elements that the website switches between in small or large size,
so if large try
driver.find_elements(By.CSS_SELECTOR, "form input[id='signInFormUsername']")[0].send_keys('User')

or

driver.find_elements(By.CSS_SELECTOR, "form input[id='signInFormUsername']")[1].send_keys('User')