vCenter appliance is showing 0 MB for the disks in vCenter UI.
Seeing the error "Some of the disks of the virtual machine "[vCenter name]" failed to load. The information present for them in the virtual machine configuration may be incomplete."
The vCenter appliance is up and running
In the vCenter appliance settings you can see the below screenshot in the "edit settings" pane:
Environment
Upgraded from VCSA 7 to 8.0.3 when the issue showed up.
5 vCenters in ELM.
Resolution
Make sure all disks are showing properly in VM datastore folder
Make sure no snapshots are running on vCenter
Create a VAMI Backup
Power off VCSA
The VM may become inaccessible. If so, you will need to remove the VM and reregister from the vmx file.