GYTB Error

Hi! I recently decided to get some badges on my 3ds, I have Luma CFW and have the GYTB cia installed to my 3ds. I ran it with PNG files at SD\3ds\GYTB\badges I get an error every time I try to load GYTB.

Error 79: Failed to open file for writing
WAAT IS WRONG WITH THE ELF. 0000004f

And then a crash. I'm not sure if I've missed something or if the application is no longer working.

Thanks for the help!