This shows up. I'm not sure what to do. Game has been working fine for years before today but I haven't played in a couple of months.

~LOADING ERROR~
Ver 1.3.3.3
2/16/2020 1:12:48 AM
Debug Flags: 0000 - 0
System.InvalidOperationException: An unexpected error has occurred.
at Microsoft.Xna.Framework.Audio.SoundEffect.AllocateFormatAndData(Byte[] format, Byte[] data, Int32 offset, Int32 count)
at Microsoft.Xna.Framework.Audio.SoundEffect..ctor(Stream stream)
at Microsoft.Xna.Framework.Audio.SoundEffect.FromStream(Stream stream)
at Monocle.SFX..ctor(String filename, Boolean obeysMasterPitch)
at TowerFall.CharacterSounds.Load(String name)
at TowerFall.CharacterSounds..ctor(String prefix, CharacterSounds original)
at TowerFall.Sounds.Load()
at TowerFall.TFGame.<>c.<Load>b__120_0()