Sounds good. Mine is a Centos8 (64) instance (I have two instances). The common thread aside from Google Platform is the Linux base. I will also note the system I tried on-prem was also Windows based running 66.0. I believe support is out on that license so I could not try 66.0.7 on it. However I loaded 66.0.7 on the Centos machines with no success. I also reverted to 66.0 per another suggestion but it had the same result. Lastly, I tried to contact Google Platform. It's not very good news. You have to pay extra to receive any kind of support (phone or chat) unless an error was thrown from Google Platform itself. The model is largely for developers and they are the ones to troubleshoot any problems. Based on the information I have gathered the OS is the next best thing to troubleshoot.