[com.alibaba.nacos.client.config.security.updater] ERROR c.a.n.c.s.SecurityProxy [SecurityProxy.java:154] - [SecurityProxy] login http request failed url: http://127.0.0.1:8840/nacos/v1/auth/users/login, params: {username=}, bodyMap: {password=}, errorMsg: errCode: 100, errMsg: Nacos serialize for class [com.alibaba.nacos.common.http.HttpRestResult] failed. 

原始配置：

spring:
  application:
    name: 
  cloud:
    nacos:
      enabled: false
      server-addr: http://127.0.0.1:8848
      username: 
      password: 
      config:
        group: 
        prefix: 
        file-extension: yaml
      discovery:
        enabled: false
        group: 

 即我们的配置文件需要配置成这样：

1. spring.cloud.nacos.config.access-key=${AK}

2. spring.cloud.nacos.config.secret-key=${SK}

AK,SK是用于读取nacos配置而创建的用户的AK,SK。