sserve2013 :
I tried all the steps but was not successful.
I then downloaded build 15014 ISO and burned it to a CD.
I then installed it successfully from the CD.
Actually you could not have downloaded the ISO to build 15014 because Microsoft has not made it available yet. Did you convert an ESD file to an ISO file? Although legal, there are many potential pitfalls with that process.
https://www.tenforums.com/tutorials/2570-esd-iso-create-bootable-iso-windows-10-esd-file.html