I reset the whole configuration, use the quickstart again. The connection refused message didn't show up and it was like step 3 was never done!
I ended up going to vSAN service, Turn it Off and Turn it On again followed filled all required inputs and my vSAN was up.
As a side note, the vCenter was not a fresh one, it was migrated from an old 6.5 Windows version. Could it be the reason? I didn't find any relation.
I am still interested to know which log is related to this quickstart process thought