title: Why is the crawler method not called in the spider?
body: <p>Why is the &quot;parse_product&quot; method not called in my code:</p>
  <pre><code>import scrapy
  import undetected_chromedriver.v2 as uc
  from scrapy.selector import Selector
  from selenium.webdriver.common.by import By
  from selenium.webdriver.common.keys import Keys
  from staff_crawlers.items import Persona
  from datetime import date
  import time
  
  
  class SiteSpider(scrapy.Spider):
      name = 'site.com'
      driver = uc.Chrome(version_main=97)
  
      def start_requests(self):
          self.driver.get('https://some.site.com/login/')
          time.sleep(5)
  
          login = self.driver.find_element(By.ID, 'email_field')
          login.send_keys('myLogin')
          password = self.driver.find_element(By.ID, 'password_field')
          password.send_keys('myPassword')
          password.send_keys(Keys.ENTER)
          time.sleep(5)
          self.parse_page('https://some.site.com/products/')
  
      def parse_page(self, url):
          self.driver.get(url)
          html = Selector(text=self.driver.page_source)
          for prod in html.css('a.resume-card__title-link::attr(&quot;href&quot;)').getall():
              url = 'https://some.site.com/products/' + prod
              self.parse_product(url)
  
          next_page = html.css('a[rel=&quot;next&quot;]::attr(&quot;href&quot;)').get()
          if next_page is not None:
              self.parse_page('https://some.site.com/products/' + next_page)
  
      def parse_product(self, url):
          self.driver.get(url)
          time.sleep(5)
          ...
  </code></pre>
  <p>among other things, I get an error:</p>
  <pre><code>start_requests = iter(self.spider.start_requests())
  TypeError: 'NoneType' object is not iterable
  </code></pre>
  <p>at the same time, the spider reaches the for loop (for prod in html.css('a.resume-card__title-link::attr(&quot;href&quot;)').getall()), gets all the links to the products, and then there is pagination, that is, after authorization of the transition to the desired page with products, only pagination occurs, product cards are not opened...
  what's wrong?</p>