Asset Catalog Compile Error - TDDIstiller instance can only be distilled only one time

Clearing the DerivedData folder for the project eliminated the error for me.

Quitting Xcode, quitting Simulator, re-opening Xcode and re-running the build afresh has worked for me. No idea though what this error is all about!

In my case something, probably to do with CocoaPod, was causing my Build directory to be created with a lowercase build. The Distiller was then looking for the Asset.car file in the uppercase Build directory as you can see from this part of the log

/Users/user/Library/Developer/Xcode/DerivedData/Videographer-
eubeafyfmzewucdlcmfhmdsusjng/Build/Products/Debug-
iphonesimulator/Videographer.app/Assets.car error 'No such file or 
directory' 

And not finding it. By manually renaming the build directory to Build I was able to resolve this error. However, I assume this is only a temporary fix as whatever set the directory to build probably still exists.