'Build input file cannot be found' Swift 4.2, Xcode 10.0

Question

I am getting the following error when building in Xcode 10.0 with swift 4.2:

Answer 1

For me something totally different worked:

Go to Target>Build Settings>Architectures

My valid architectures before: arm64 arm64e armv7 armv7s (Defaults)

Changed it to: armv7 i386 arm64 armv7s