Problems after upgrading to Xcode 10: Build input file cannot be found

Question

I upgraded my Xcode SDK to version 10 last night and then find I cannot build.

I\'m getting this error:

Build input file cannot be found: \

Answer 1

In my case, I had created a new test target and deleted the default swift file so it was left with just the info.plist. Adding a new file fixed this.