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Hopefully you've solved the issue in the meantime, but this information might come in handy for others experiencing the same issue.
I saw this same issue when trying to install vCenter (with embedded PCS) on my setup.
What ultimately fixed it was when I created the reverse-lookup entry for the dns-entry.
So if you haven't solved this yet, you should probably double-check your dns-setup.
Creating a reverse lookup in DNS resolved this error for me as well- thanks!