Correct py got error on another windows 7

[meetinnet]

So sorry that I can't describe accurately in the title because I don't really understand this issue.
I have a simple Py file which simply post some data to a website.It worked very well on my Windows 10 and windows 7, but got strange error on another windows 7. Part of the codes:

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import requests
url = 'https://someweb.com/submit'

headers={
        "Host": "something.com",
        "Connection": "keep-alive",
        "Content-Length": "100",
        
}
   
def format(Cookie):
    cookies = {}
    for line in Cookie.split(";"):
            if line.find("=") != -1:  
                name, value = line.strip().split("=")
                cookies[name] = value
    return cookies

fp = open ("1.txt","r")
Cookie = fp.read()
fp.close()
CookieNew = format(Cookie)
DataNew = '{"vId":"000104","serviceId":"1002"}'

requests.post(url, data=DataNew, headers=headers, cookies=CookieNew)

The format(cookie) function changes the format to JSON I guess because the website only accept this format.(Googled)
The first error is

Error:
UnicodeEncodeError: 'latin-1' codec can't encode characters in position xx-xx:
 ordinal not in range(256)

Then I googled and changed the

fp = open ("1.txt","r")

to

fp = open ("1.txt","r",encoding = "utf-8-sig")

Now I got this error from website:

{"timestamp":"2020-04-23 16:47:15","status":500,"error":"Internal
Server Error","exception":"org.springframework.http.converter.HttpMessageNotRead
ableException","message":"Could not read document: Unexpected character ('i' (co
de 105)): was expecting comma to separate OBJECT entries\n at [Source: java.io.P
ushbackInputStream@6bc0aae7; line: 1, column: 105]; nested exception is com.fast
erxml.jackson.core.JsonParseException: Unexpected character ('i' (code 105)): wa
s expecting comma to separate OBJECT entries\n at [Source: java.io.PushbackInput
Stream@6bc0aae7; line: 1, column: 105]","path":"/dir/cou/submit"}

I'm confused that this is the same py file. What makes this error and how do I google this because it looks like java responses.

If I use encoding = "utf-8" instead of encoding = "utf-8-sig", the error is

Error:
UnicodeEncodeError: 'latin-1' codec can't encode character '\ufeff' in position
xx: ordinal not in range(256)

The OS of windows 10 and the widnows 7 with py error are Asia version,the other windows7 without error is English version.

The content of 1.txt here,it's a cookie file.

Output:
Hm_lvt_4a693f348daf8481dd541c844122c053=1585791910; JSESSIONID=D524881BB65001A53B445AA4EDC14FC7; Hm_lpvt_4a693f348daf8481dd541c844122c053=1587654145; Hm_lvt_bc864c0a0574a7cabe6b36d53206fb69=1583560881; 

Thanks for help and sorry for the chaotic description.