What is this Scrapy error: ReactorNotRestartable?

I do not understand why my spider wont run. I tested the css selector separately, so I do not think it is the parsing method.

Traceback message: ReactorNotRestartable:

class espn_spider(scrapy.Spider):
    name = "fsu2021_spider"
    def start_requests(self):
        urls = "https://www.espn.com/college-football/team/_/id/52"
        for url in urls: 
            yield scrapy.Request(url = url, callback = self.parse_front)
    def parse(self, response):
        schedule_link = response.css('div.global-nav-container li > a::attr(href)')
process = CrawlerProcess()
process.crawl(espn_spider)
process.start()

Answer

urls = “https://www.espn.com/college-football/team/_/id/52” for url in urls:

You’re going through the characters of “urls”, change it to a list:

urls = ["https://www.espn.com/college-football/team/_/id/52"]
...
...

Also you don’t have “parse_front” function, if you just didn’t add it to the snippet then ignore this, if it was a mistake then change it to:

yield scrapy.Request(url=url, callback=self.parse)