Hello GSFC, You are going to need to open a support case so that we can resolve your issue.
while I was trying to upgrade esxi 6.7 version to latest version, I made mistake, and i upgrade it to two version in upgrade step, so when i am trying to revert back to old version , i am still on wrong esxi version so I downloaded new ISO from VMware using custom ISO with correct build.  after I installed it and trying to add it back. i can't find host in VxRail "add VxRail Hosts" screen , please help. or send me step to reinstall this host back in VxRail cluster. I am using VxRail 4.7.300.
by mistake I have removed VxRail node and now I can't add same node