DarkStorm's API Errors

My problem is that I was trying to install DarkStorm's GUI API into my client, but then I got 2 errors I couldn't solve.

I tried to fix the errors based on the Java recommendations, but it did not end up fixing. I have installed Slick2.0 and LWJGL.

I am on a Macintosh 2011 13' Macbook Air.

The error is in the code, not Singleplayer or Mulitplayer.

It is DarkStorm's GUI API, it is compatible with Minecraft 1.8.

I am using a legitmate account.

Hopefully someone can help me solve this issue!

Bump I had the exact same problems on my Windows Please help someone

Have you tried turning it off and back on?

No response after two days, assuming solved.
/Closed