Package Biulder

[Cheers]

Hello, everyone!

I'm trying to make my first scene, but I have a problem, I've been looking for a solution, but I can't find it.

How do I solve it? Here is the sound I need in the scene.
And this error on all sounds.

Please help!

 

[Cheers]

I think I solved the problem, I just pressed this button.
Sorry