Kolbee101

Is there anyway to run my modpack for 1.7.10 without the Fatal Error message? I know of servers running this pack, so I am quite confused when told that its outdated and then my whole topic was closed. I'm quite lost and could use a bit more explanation to this.

Whenever I load my 1.7.10, modded world or attempt to at least, I get this error message. I do not know how to post logs so if someone could also explain that to me I'd be grateful. Please tell me anything you could think of that's causing this and I'll do my best to cooperate.