I'm guessing you don't have a "ArchiCAD Library 12" folder within your Graphisoft/ArchiCAD 12 folder, or you're missing the "ArchiCAD Library.version" file within the same folder.
MacBook Pro Apple M2 Max, 96 GB of RAM
AC27 US (5003) on Mac OS Ventura 13.6.2
Started on AC4.0 in 91/92/93; full-time user since AC8.1 in 2004