I thought i ran into the same problem as you describe above, after upgrading my PI, but managed to sort it by removing ZT then rm -rf /var/lib/zerotier-one/ and then reinstalling ZT.
It authorises as a different device, but i'm back up now.
Not sure if you have tried this ?
@jbroo , I have not had a days issues with ZT and Rain. I have double checked and I have 4 devices running 1.6.2 and are currently connected, and a few 1.4.6, also connected.
Have you got your devices to auto join or do you have to auth them manually.
are they getting IP's from ZT ?
Bizarre...
So I finally bought my first apple hardware, and I was told to rather get a us iTunes account and use vouchers to buy apps.
The issue I'm having is that there is no longer the 'none' option as a payment method on the iTunes signup form.
Has anyone else had this problem when creating a us...