I've been trying to add custom music to my DooM .wad with XWE, but the moment I try launching it I get the error 'Failed to create key .wads' then 'List index out of bounds (0)'. After trying to open my .wad I get 'List index out of bounds (3)' and then it gets stuck with the little loading symbol forever. I'm quite unfamiliar with making and editing .wads, so I really have no idea how to fix this issue. I've seen other people having the same problem, but no solution. Please help!