Strange Error Response - Requests

Updated code - I'm using this code to send the request: headers = { 'Host': 'www.roblox.com', 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52

Solution 1:

Because it works in Burp but not in Python requests, get a packet sniffer (Wireshark is the simplest IMO) and look to see the difference in the packet sent by Burp that works and the one sent from Python that does not work. I am suspecting that the problem is that the website is HTTPS but you are using http://www.roblox.com . Do try https://www.roblox.com , but I am not sure if it will work.