Unable to load VUM Inventory in vCO

I recently setup a vCO Appliance in our environment and the VUM workflows are unable to view the vSphere inventory. The vCenter plug-in works fine and the VUM plug-in can see Baselines, so I know the general configs are good. Below image is what I get in the local client. Same issues with the Web Operator.

VMware Support has spent a couple weeks looking at, but nothing. The logs show the inventory being received by the appliance, but then nothing.

Versions:

VUM Plug-in: 5.1.0

vCenter Plug-in: 5.1.1

VCO Appliance: 5.1.1 build 2942

vCenter: 5.1.0 947673