The topic is old, but I did not see the answer.
I made a fresh installation of ESXI and VCSA 7 versions, and hit the same problem, I still have to figure problem out the memory.
And adding a new ESXI host took a long time. I have tried a lot of things described in the community. I was able to add new host only using the ROOT account on ESXI, which was immediately deactivated after a fresh installation according to the security policy(habit).
I do not understand what permissions an account different than root should have, if administrator rights are granted.
It is checked on 2 hosts, it works!
PS. root account may deleted after host added.