This host has no isolation addresses defined as required by vSphere HA

Had some troubles with an ESXi 5.5 host the past week and rebuilt some of the networking which included removing a vmkernel and re-adding to a standard vSwitch and then setting up VMotion and Management tags on it.
Came across the following error on my host in vSphere Client:

To resolve this issue, I needed to make sure that there is a default gateway on the port group that the VMotion vmkernel is on.
Click on the ESXi Host then navigate to Configuration > Networking and on the VMkernel Port that I’m using for VMotion, click Properties…

Next, I examine properties of the VMotion VMkernel.

Looking at the IP Settings tab, I see there is no VMkernel Default Gateway defined, so I clicked Edit…

I entered in my default gateway and clicked OK and then OK again to exit the switch properties dialog.

Finally, I right-click on the ESXi host and click Reconfigure for vSphere HA

At this point, no additional errors are reported for my ESXi host.  =)