I know that this doesn't really help, but is there any way that the sound errors and the texture error could be related in any way?
Also, does your computer have an anti-virus? This could be a virus you obtained from somewhere that deleted a random folder, which happened to be a sound folder, or something along those lines.
Just throwing things out here.
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RP Characters Are:
SQ - Me, can turn into an enderman, and is good friends with Pi. He appeared with Emma in "The Unnoted Village".
Emma - My magical twin cousin, able to turn into a mooshroom. She knows Pi and thinks he's famous, and she has appeared in "The Unnoted Village".
sans - A skeleton who seems lazy at first, but knows more than he lets on. He's courageous and doesn't like h8rs.
they are almost certainly related, and that error message is from the skin download failure BUT YOU DIDN'T POST ALL OF IT
Stop trying to cherry pick data when you have no idea what is or what is not important. The fact that an error happened is interesting (what you posted). The WHY it happened is important (what you didn't post).