background music issue (missing mod music file...)

[Kmdeea]

I am trying to add background music to my mod but once I try to update or to load unpacked, it tells me this:
Missing mod music file AnXi.mp3.
Could not load manifest. ,
even though the files are in the music folder, I checked the names to be written correctly in the code many times, I checked them to be the MP3 format and they are. What should I do? :,)

[Kmdeea]

nevermind I fixed it :D

[Agentjah]

how u fix

[FRLiberty34]

how did you do ?