Failed to load content Tiger Game.com

I’ve been attempting to get this to work for quite some time now. At this point, I have a tiger game.com playlist made from manual scan only. Using scan directory doesn’t work. I have all the released games in a gamecom folder with the internal and external bios included. All files are compiled. I also tweaked the mame.opt as directed. However, when I try to play a game from my playlist or load content, it yields Failed to load content. Please advise.