Upgrade to ESXi 7.0: Missing dependencies VIBs Error
This error gets me from time to time, regardless which server vendor, mostly on hosts that were upgraded a couple of times. In this case it was a ESXi host currently running a pretty old build of ESXi 6.7 U3 and my job was the upgrade to 7.0 Update 3c.
If you add a upgrade baseline to the cluster or host, and you try to remediate the host, the task fails with a dependency error.