Tic Tac, let’s see if they fix it before I cancel my trial period. I’m not gonna pay for something that has such a basic flaw. I was really confused why It wasn’t working, and had pretty high hopes for this software.
The .ass file doesn’t appear to have the fonts included. I don’t know a lot about subs but from what I read your file needs to include the fonts for the .ass format. I checked my demo file and it has the fonts after the [V4+ Styles] and before the [events].
Maybe download another .ass sample and make sure it has the fonts in it and see if it shows up in the playback options then.
Also, have you looked for a different type of subtitle other than the .ass?
Unfortunately, there are technical limitations here as macOS grants access to a particular file when using drag & drop (or Open With), and this does not extend to other files which may be located nearby.
One thing you can do to workaround this is to place videos and subs in the Movies/Infuse folder, and access these videos through the Files tab in Infuse. There, Infuse should be able to access both videos and subtitles.
But the other player such as IINA can automatically load the subtitles next to the video when using Open With. Not facing the problem of no permission.