I have 2 KVMs created and plenty of resources for each and the problem even occurred with only a single KVM using minimal resources.
For some reason the "sites" or KVM are not accessible via http or https periodically for no apparent reason. Both appear to be "down' at same time, though in ALL cases, where I have attempted, the Virtualizor itself is fine with no porblem. I would think that means the server itself is ok, and the problem is within the KVM itself.
Pretty standard setups on Centos 7 latest.
Any ideas of cause?? They eventually come back on their own, but sometimes I get impatient after couple of minutes (yes, 2 minutes or more) and I then restart the VM.