查看调试日志如下：
[2024-04-09_11:01:01:619]//<Start opening a MQTT client
[2024-04-09_11:01:08:965]//<URC Open a MQTT client successfully
[2024-04-09_11:01:08:965]//<Start connect to MQTT server
[2024-04-09_11:01:28:551]<-- Other URC: type = 16
type=16是什么错误类型？怎么处理？