Cloudflare Error 1015 refers to the rate limiting error. It is thrown by Cloudflare when the website owner has implemented a rate limit for requests and you are violating that rate limit. This can happen when you are sending a ton of requests in a very short amount of time.
You can get around this error in two ways. One is to throttle your requests. Make sure you are only sending a limited number of requests in a given time. Another way to get around this error is to use a reliable premium proxy provider like ScrapingBee. ScrapingBee makes sure to rotate the proxies so no one proxy triggers the rate limiting. This should help you bypass the Cloudflare 1015 error.