[Python] Getting Error 400 Bad Request when Injecting Code with Scapy

I am trying to implement a code - injector using scapy and netfilterqueue. I am trying to modify the HTTP Requests by removing the "Accept-Encoding: " parameter so the HTML code won't be encrypted. However, when I do, and when I run the program, I get Error 400: Bad Request when I try to access HTTP websites. Below is the full implementation. Why is this happening?

import netfilterqueue
import scapy.all as scapy

set_load(packet, load) :
packet[scapy.Raw].load = load
del packet[scapy.IP].len
del packet[scapy.IP].chksum
del packet[scapy.TCP].chksum
return packet
def process_packet(packet) :
sp = scapy.IP(packet.get_payload())
if sp.haslayer(scapy.Raw) and sp.haslayer(scapy.TCP) :
if sp[scapy.TCP].dport == 80 :
load = str(sp[scapy.Raw].load)[1:]
modifed_string = re.sub(r"Accept-Encoding:.*?\\r\\n", "", load)
new_packet = set_load(sp, modified_string)
packet.set_payload(bytes(new_packet))
packet.accept()
queue = netfilterqueue.NetfilterQueue()
queue.bind(0, process_packet)
queue.run()

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