I have an export template that was wokring on whatever version was around in March, but no longer. It generates a very simple error box that simply says "!"
Here is the template, tried on different files:
$filename(export.mp3tag.csv,utf-8)Band,Album Artist,Album Year,Album Name,Album Disc,Track Number,Track Title,Track Artist,Genre,Extension,Size,Tags,Codec,Publisher,Filename,Path
$loop(%band%)$loop(%year%)$loop(%album%)$loop(%track%)%band%,%albumartist%,%year%,"%album%",%discnumber%,"$num(%track%,2)","%title%","%artist%",%genre%,%_extension%,%_file_size_bytes%,"%_tag%",%_codec%,%publisher%,"%_filename_ext%",%_folderpath%
$loopend()$loopend()$loopend()$loopend()
