[Icecast] Client auth failed with ""

[subscription at nextdial.com.br]

 Hello,
 We are using url authentication and getting the item bellow at the log:
  
 [2018-08-24  23:26:05] INFO auth_url/url_add_listener client auth 
(http://127.0.0.1:8001/listener/add) failed with ""
  
 I put try/catch and reviewed all my code ensure always return a proper 
status and header error code, so what trigger this kind of error?

  
  
 Regards,
 Thiago
  

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