I recently bought an SD2SNES off of Stone Age Gamer, but when I tried testing it, I found that it didn't load any of the ROMs or folders I had on the SD card. I could access the options menu, but by default, all I saw was this screen:

Here's the folder structure I last tested with:

I've tried on two different microSD cards with the two latest firmware versions, but no luck. I've run the SD2SNES diagnostic tool, and according to the log file, it passed every test that it ran. Does anyone know what the issue could be? Thanks in advance.