Re: This virtual machine failed to become vSphere HA Protected and HA may not attempt to restart it after a failure

Just try to  disabled vSphere HA on the cluster .

if that doesnt work then you are having a Fault Tolerance, The tables in the following article list some of these error messages. For each error message there is an explanation of the condition and information about resolving the error .

VMware KB: vSphere HA and FT Error Messages

Best regards

Yours, Oscar