Resource Pack bug

So I was making a resource pack for a map I'm making (Spoilers)
And I noticed my sound wasn't working.

I thought it was something that usually affects me anyways when my sound goes away. (That has something to do with my computer)

But then I noticed that the default textures says "missing mc.meta "

My sound went away when I updated my textures and now I can't hear anything.

I don't know how to fix it and I don't know how to reproduce the bug