Scrapy – issues with ‘dont_filter’ option for Requests

I must include the option dont_filter=True into each request of my spider, I’ve already used this option but I don’t know why this time I get this error: Unhandled Error Traceback (most recent call last): File “C:\Users\coppe\Anaconda3\envs\scrapyEnv\lib\site-packages\scrapy\commands\”, line 58, in run self.crawler_process.start() File “C:\Users\coppe\Anaconda3\envs\scrapyEnv\lib\site-packages\scrapy\”, line 293, in start # blocking call File “C:\Users\coppe\Anaconda3\envs\scrapyEnv\lib\site-packages\twisted\internet\”, line […]