while len(driver.find_elements(By.XPATH,"//*[@title='Next page']"))!=0:
The element is not found (and the while loop skept), I tried adding a timer
ui.WebDriverWait(driver, 5).until(EC.presence_of_element_located((By.XPATH,"//*[@title='Next Page']")))
Still impossible to make selenium recognize the element. I don't think I saw anything that looked like an iframe on the source (I might have missed it).