Cloudflare Error 1020 refers to the Access Denied error. It is thrown by Cloudflare when you violate a firewall rule set up by the Cloudflare-protected website. This violation can occur due to various reasons including sending too many requests to the website.
If the website is working fine without using automated tools then you need to improve your web scraping techniques. You can hide your automated requests by making use of undetected-chromedriver or a similar tool and pairing it up with premium proxies from a reliable proxy provider like ScrapingBee. Or better yet, use ScrapingBee's APIs and let us handle the task of not getting blocked. This should help you avoid the 1020 error.