设置好机器人和yaml文件了，但是不能正常的运行，请问这是怎么回事？

按照https://github.com/project-mirai/mirai-api-http的教程使用mcl安装net.mamoe:mirai-api--http后，配置完setting.yml文件(用的全是默认)，在此打开mcl显示失败。
10:42:21 [ERROR] Failed to fetch announcement for "net.mamoe:mirai-api--http"
10:42:24 [ERROR] Failed to verify package "net.mamoe:mirai-api--http"
10:42:24 [ERROR] com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $