I have installed QAC plugin to my Jenkins server， and configure my PC（win10） as Jenkins agent, and config QAC installation in Jenkins Global Tool Configuration as below,

and config dashboard server in Jenkins System configuration as below:

and then use Jenkins Pipeline Syntax to generate a pipe line script, then copy & paste it to a job configure page, 

then build this job, and finally the job build is failed. I checked the log, it always failed after the analyze phase, the error is about remove license,

I test this command (qacli admin --remove-license-server 5055@10.10.0.250) manually, the rtesult is that it can be removed.

 I have searched the websites but can  not find any more detailed information about the plugin usage.

So I don't know what's wrong with it? 

Would you please kindly help to solve this?