500 server error when using jenkins python module build_job(job_name, parameters=) method
The problem may appear when the job you are trying to build with python-jenkins doesn't require any parameters, so if you try to pass some, it just fails.
Please, doublecheck this.
Hope, it will help
server.build_job(self.job_full_name, parameters=params) when parameters is not None, jenkins.JenkinsException: Error in request. Possibly authentication failed [500]: Server Error occurs. It works when parameters=None.