Hello David,
Thank you for contacting the Skyline Community.
The issue is inherent to all Linux VMs, irrespective of if it is a VMware Appliance or a Linux Guest OS VM.
Skyline Appliance is customized as per the Host ESXi during deployment, It will select the latest recommended adapter type based on hardware version and ESXi host version.
I was able to trace your SR, I checked your collector status from VMware end, I could see the heartbeat and payload from your collector, the next analysis is set for 3/3/2019, you should be able to see updated recommendations by then.