Ok. Does that mean the document section "Deploying RhoConnect with High Availability on Amazon Web Services" on "http://docs.tau-technologies.com/en/5.5/rhoconnect/rhoconnect-redis-stack" is no longer relevant?
I believe that is the reason. Those AMIs contained preinstalled RhoConnect environment. Possibly ami-cbc59e8e and ami-0dfca748 were removed by Zebra or Amazon. I also would like to point that in those AMIs used very old RhoConnect version. So I see 2 options:
1. You should create your own AMI with the latest RhoConnect server. But you should understand how to set up RhoConnect properly in that AMI. 2. Tau team can create most up to date AMI and publish it to Amazon.