I went to the download section and I see downloads for Ubuntu, etc. but no RHEL versions. Does it need to be built from source?
I use the centos 8 version with RHEL 8.7, not having any issues: https://github.com/openpbs/openpbs/releases/download/v20.0.1/openpbs_20.0.1.centos_8.zip
I had no issues compiling under Centos7 using the provided spec file.