Python with selenium: unable to locate element which really exist

Question

I\'ve been trying fill input:

Answer 1

The problem is that your input tag is inside an iframe, you need to switch to it first:

frame = driver.find_element_by_xpath('//frame[@name="main"]')
driver.switch_to.frame(frame)
pass1 = driver.find_element_by_id("PASSFIELD1")