As per title, I'm working on a little project, but can't get SSA or ASS type subtitles working with the default win10 film&tv app. Does anyone have a working file you can send me as a demo? I think there might be a bug in the program, possibly something in the subtitle file syntax that is causing a problem that I can't pinpoint (because my SSA and ASS files are working fine in VLC). I've explored all other avenues. Even though the app offers to open ssa/ass file, it doesn't seem to. So either there is a syntax specific error, or it's just a broken feature.