Hello.I have requested the token and create of model hr.applicant .  It worked fine.But,the second time i tried to request the token again,it failed.

I am getting the following error of type 500:

/strong> HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><title>500 Internal Server Errortitle><h1>Internal Server Errorh1><p>The server encountered an internal error and was unable to complete your request. Either the server is overloaded or    there is an error in the application.p>

Can you help ,please ?