No error is shown when creating a new virtual disk fails on the edit screen of virtual machine.
This applies if the virtual disk is:
- tried to place the new virtual disk to datastore cluster
- no datastore to store the new virtual disk was found due to insufficient disk space
vSphere Client can't handle the error properly.
This issue is fixed in vCenter 8.0U1 and later.
You can see this error when using fixed version vCenter.