Getting “Cannot verify client. (3000)” when trying to upload archive from Xcode to itunesConnect

Question

Just updated to Xcode 7.1 and getting this error. Was able to upload fine using 7.0.1

Answer 1

From the rest of the answers it seems that a lot of different things "resolve" this issue. Here are the particulars of what solved it for me:

1. The iPad had to be plugged in.

2. The iPad had to be signed in (i.e. not locked).

After I satisfied those two conditions, it validates and uploads reliably. If either one isn't done, I am not able to validate or upload to iTunesConnect and I get the Cannot verify client (3000) error.