vSphere HA agent cannot be correctly installed or configured

VMware ESXi, 6.7.0, 15160138

Symptoms

Error: "vSphere HA agent cannot be correctly installed or configured"

Reconfigure HA - The object 'vim.Datastore:datastore-XXXX' has already been deleted or has not been completely created.

Cause

The datastore-xxxx(LUN) was removed. However after reconfiguring HA it still was trying to use the LUN that was removed.

Solution

Use Option 2 - Select two or more specific datastores.

Reference

https://knowledge.broadcom.com/external/article?legacyId=2056299
https://davidstamen.com/2018/01/19/reconfigure-ha-the-object-vim.datastoredatastore-xxxx-has-already-been-deleted-or-has-not-been-completely-created/