VMWare Horizon install fails on RHEL7.1 with libXss.so.1 missing

Trying to install VMware Horizion on a RHEL 7.1, as it shows its supported:

https://pubs.vmware.com/horizon-7-view/topic/com.vmware.ICbase/PDF/horizon-70-linux-desktops.pdf

Able to run the install and when running the final scan it shows the following:

VMWare Horizon Client 
     Failed     libXss.so.1

I looked under the REd Hat Website for this package to download and don't show it listed.

So, just wondering if anyone else has this successfully installed how they went about it.

thanks