ct-submit : unexpected status 400 Bad Request from log server

Question

使用ct-submit (https://github.com/grahamedgecombe/ct-submit) 来提交我的证书到ct.googleapis.com/pilot的时候，得到这样的错误信息，是怎么的呢？

D:\ct-submit>ct-submit ct.googleapis.com/pilot <gpe.cer >gpe.sct

unexpected status 400 Bad Request from log server:
   {
      "error_message": "Invalid Request.",
      "success": false
   }

请大神帮看看，谢谢。