While fixing the Harvard exporter, I noticed that all layout files still use the old AuthorsFormatter chaining:

https://github.com/JabRef/jabref/tree/master/src/main/resources/resource/layout

The format for author formatting has changed to https://docs.jabref.org/collaborative-work/export/customexports
it's now seomthing like \format[Authors(LastFirst,....),HTMLChars]

JabRef version on

• Mandatory: I have tested the latest development version from http://builds.jabref.org/master/ and the problem persists

All layout files must be checked and the Author and Editor Formatter changed