请问为什么代码不能抓取下一页（分页链接）

Question

import scrapy
from scrapy.crawler import CrawlerProcess
from scrapy import Request

class data(scrapy.Spider):
    name = 'data'
    start_urls = ['https://nigeriapropertycentre.com/for-sale/']

    def parse(self, response):
      
       cards = response.xpath("//div[@class='wp-block property list']")
       for card in cards:
            
            # features
            Title = card.xpath("//a/h4/text()").get()
            Address = card.xpath("//address/*[i]/text()").get()
            link = card.xpath("//div[@class='description hidden-xs']/a/@href").get()

            request = Request(link, callback=self.parse_details,meta={'Tilte':Title, 'Address': Address, 'link': link})
            yield request
            
            # perse pagination
            next_page = response.css('li.next a::attr(href)').get()
            if next_page is not None:
                # go to next page untill no more page
                next_page = response.urljoin(next_page)
                yield scrapy.Request(next_page, callback=self.parse)
    
    def parse_details(self,response):

        # get sq m and other shizz from detail page
        Description = response.xpath("//p/text()").getall().replace('\n','')

        # use meta, not cb_kwargs with Request!
        Title = response.meta['Title']
        Address = response.meta['Address']
        Link = response.meta['Link']
        #
        yield {'Tilte': Title, 'Address': Address, 'Description': Description, 'link': Link, }

#main driver
if __name__ =="__main__":
    process = CrawlerProcess()
    process.crawl(data)
    process.start()

以下为错误回复，请指教

回溯（最后一次通话）： 文件“C:\Users\Franklin\Desktop\Coding env\Lib\site-packages\scrapy\utils\defer.py”，第 257 行，在 iter_errback 产生下一个（它） ^^^^^^^^ 文件“C:\Users\Franklin\Desktop\Coding env\Lib\site-packages\scrapy\utils\python.py”，第 312 行，在next 返回下一个（self.data） ^^^^^^^^^^^^^^^ 文件“C:\Users\Franklin\Desktop\Coding env\Lib\site-packages\scrapy\utils\python.py”，第 312 行，在next 返回下一个（self.data） ^^^^^^^^^^^^^^^ 文件“C:\Users\Franklin\Desktop\Coding env\Lib\site-packages\scrap