Xcode 8 - Missing Files warnings

Question

Ever since upgrading to Xcode 8 using Swift 2.3 I have several missing files warnings. They are all related to pods that I am using.

The files that are missing are

Answer 1

I tried all of these (and many others) but none of them worked. After hours of trying various fixes, I found that the following procedure worked.

cd "project directory"
git add .

You will need to close XCode and reopen or future Commits may fail.

Hope this helps someone.