iTunes Connect: There was an error importing this build

I received this error for the first time yesterday.
I did not have bitcode turned on.
I had no other message beyond the iTunes "There was an error importing this build".

Today I bumped up the version number and resubmitted and it worked.

Random problems like this happen to me sometimes and instead of uploading from the Xcode organizer what I do is use the organizer to export a build and then use Application Loader (available from the Xcode menu -> Open Developer Tool) to actually upload it. Sometimes it helps and sometimes it doesn't, but it's worth a try.

Apple has replied that this is a known issue with Xcode 7.3 and Bitcode. So, I disabled including Bitcode uploading with the binary and it successfully processed!:

You do not need to disable it for the entire project, but it works that way too (tested with both project Bitcode enabled/disabled with Bitcode upload inclusion disabled).

Edit: Builds as of 4/7/16 are now successfully uploading and processing with Bitcode.