Oh! that's strange ... when I start mame I get the message
Error parsing folders \ ***here name of the ini file***: missing [folder name] or [ROOT_FOLDER]
When I press accept once for each ini file with problems, Mame works fine and the strangest thing is that those categories do work well (?). Well, never mind, maybe for the next version it will fix itself.
Edit: I fixed it by doing what Jorge said.
Edited by Saknet (04/09/21 10:35 PM)