That is often what happens if the partitions are not what the installer expects them to be. But I don't think that can be the problem here, so it may be the port.

@advocatux Thank you for bringing it to my attention. I do believe the issue may be related, and I will likely add my part to the github comment chain.

@Muzlabliz You should get OTA-8 by Sunday anyway so best wait till then. Here's the info link
p.s It also tells you how to get it now just in case you can't wait : )