Operations-about WeChat alarm API issues, messages cannot be sent out

Operation PHP

I used the alarm API to try to alert my public number, but always:
PHP test.php
PHP notice:undefined index:http_user_agent in/home/redhat/scripts/gun/weixin/include/leaweixinclient.php on line 33
PHP notice:undefined index:http_user_agent in/home/redhat/scripts/gun/weixin/include/leaweixinclient.php on line 33
StdClass Object
(
[Base_resp] = StdClass Object
(
[RET] =-1
[ERR_MSG] = system error
)

)
What's going on? Not 48 hours without the issue of information, is not a configuration problem, is not the API is not used??

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