please answer my question

[hj00494yong]

when i run python3 exploit.py -ip 192.168.2.89 , 结果报错了 ，

Traceback (most recent call last):
File "exploit.py", line 468, in
do_rce(args.ip, args.port)
File "exploit.py", line 433, in do_rce
build_shellcode()
File "exploit.py", line 308, in build_shellcode
KERNEL_SHELLCODE += USER_PAYLOAD
TypeError: can't concat str to bytes

如何处理呢

[hj00494yong]

my question had resolved ,thanks ,i modify exploit.py USER_PAYLOAD 字符 with b