Unable to save download. wood4.ogg

Every time I try to play Minecraft I get a message like this "Unable to save download. wood2.ogg". It changes the issue every time I press play. Like it would change to "Unable to save download. wood4.ogg" from "Unable to save download. wood2.ogg". It worked completely fine until 12:00 am and then stopped.

Please help.
Thank you.