The vCenter Server Appliance Management Interface (VAMI) might not display the vCenter Server (VC) 6.7.x patch and you might not be able to perform an upgrade.
This issue is resolved in vCenter Server 6.7U1. To download this product, see Download Broadcom products and software.
Workaround:
To work around this issue if you do not want to perform a fresh installation, use the vCenter Server Appliance Management Interface to patch your vCenter Server system to vCenter Server 6.7.x.