调用百度智能云人物动漫化API，报错 keyerror，这个怎么解决？

# encoding:utf-8
import base64
import requests

imgPath = r'./微信图片_20210410135001.jpg'
filePath=r'./结果/.1.png'


def Get_access_token():
    url = "https://aip.baidubce.com/oauth/2.0/token"
    access_token = ''
    parms = {
        'grant_type': '',
        'client_id': 'zwOTmcj5uw4Sf1HHWHsXtUvF',  # API key
        'client_secret': 'mHnSBN0Fb6KjfATpG4SOVvFGGN53dkUU'  # Secret Key
    }
    res = requests.post(url, parms)
    if res:
        print(res)
        print(res.json()['access_token'])
        access_token = res.json()['access_token']
    return access_token


def tx(access_token):
    url = "https://aip.baidubce.com/rest/2.0/image-process/v1/selfie_anime"
    # 要转换的图片
    f = open(imgPath, 'rb')
    img = base64.b64encode(f.read())  # 转码
    parms = {
        "image": img,
        "access_token": access_token
    }
    headers = {'content-type': 'application/x-www-form-urlencoded'}
    res = requests.post(url, parms, headers=headers)
    return res


def get_picture(res):
    if res:
        with open(filePath, 'wb') as f:
            image = res.json()['image'] # 获取返回json格式中image
            image = base64.b64decode(image)  # 解码
            f.write(image)
            f.close()
            print("已完成")


if __name__ == '__main__':
    access_token = Get_access_token()
    res = tx(access_token)
    get_picture(res)

import base64,requests,time
# host='https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id=zwOTmcj5uw4Sf1HHWHsXtUvF&client_secret=mHnSBN0Fb6KjfATpG4SOVvFGGN53dkUU'
# res = requests.get(host)
# if res:
#     print(res.json())
#     time.sleep(9999999)


url = "https://aip.baidubce.com/rest/2.0/image-process/v1/selfie_anime"
f = open('0001.jpg','rb')
img = base64.b64encode(f.read())  # 转码
params = {"image": img}
token='24.19d684a7c1c897c4dc1512ba63cb6c0c.2592000.1620643246.282335-23965337'
url=url+'?access_token='+token
headers = {'content-type': 'application/x-www-form-urlencoded'}
res = requests.post(url, data=params, headers=headers)
image=res.json()['image']
image=base64.b64decode(image)
with open(r'animation.png','wb')as f:
    f.write(image)