So I'm trying to add slick utils. I tried to add it in File > Project Structure > Libraries via a .jar. Got this far

Clicked okay, and it looks good

Then this happened when I clicked okay again

I can add it successfully in global libraries

And I can import it successfully into my project

But it crashes? It sends my cursor to the import but there are absolutely no errors there. I have no idea what to do. Can somebody help me?