Unfortunately you did not provide any information in your post beside an error message and the Oracle Linux forum is probably not the right place for this question. However, I suggest to see the README, which mentions that is is necessary to edit your boot loader configuration file to add a new boot menu, which uses an mpp-2.6… initrd image.
Thread has been moved from the Oracle Linux forum space to the Generic Linux forum space.
Though OL may be built upon Redhat, it is NOT Redhat Linux. It is Oracle's distribution as they chose to assemble it.
Additionally, your question is more a generic "how do I install an open source package on a Linux distro" question than anything specific to Oracle's OS.