i need help my textures corrupted and it wont let me give them new textures please help

[ripe coyote]

Show what you mean by "corrupted"

That just looks like it has no textures

What "won't work"?
Does it not let you paint or what?

Yeah, that doesn't mean it's corrupted

That just means it couldn't automatically find the texture cause it's not in a proper resourcepack folder structure or was moved/renamed afterwards

And it usually actively warns you about the former

And you can just rightclick that red icon and click "change file" to load the texture manually