You have two options – RPM or Docker
Iff you want to use the RPM file, please the latest version which is 4.1.13. There are docs available at http://docs.openiam.com/. They will guide you through the install process including what you should be do after installing the RPM file.
If you want to install using docker, then drop a note to sales with your docker hub id and they can grant you access. Right now you don’t have access to docker and why you are getting the permissions error.