Missing acp.a class file

[Kelrian]

This has to be the 18th time I've tried, and the error report reads the same. Every time I've downloaded the forge universal file it tells me I am missing the acp.a class file. I don't know how to get it, or what's going wrong, but it literally has not shown up once in the zip I downloaded. I don't know what's wrong, I know nothing about coding, and I don't know how to fix it. Can someone help or at least send me the file I need. Thank you. Here is the error report, just in case I messed up in my terminology.

 

http://pastebin.com/vYZe6xdL

[LexManos]

acp.a isnt a fucking class its a god damn field that gets it's access level transformed by forge at load.

If you install forge properly IT WILL BE TRANSFORMED.

Do not make a fucking new post, just install forge properly and as I said if you're to retarded to drag and drop from one zip to another, get a launcher to do it for you.