Couchbase server RHEL 8 installation error

Getting an error below trying install couchbase server on RHEL 8:

The package was taken from that guide
I suggested that the package is not valid for that Red Hat distributive so decided to take link from official cite directly:

By installing it getting next errors:

What packages are actually required at RHEL 8 for installation? Or maybe I using wrong couchbase package?

It sounds like you don’t have an x86_64 architecture.

Do you know what architecture it is?