Server Issues/Forge

[Compelix]

I'm currently in mid series of recording with friends on my server and just loaded up the server today and was prompted with this error. It told me to make a backup of the world just in case, and I really can't lose this world. Please help!

ERROR:

http://pastebin.com/ULdVcMnV

 

[Munaus]

Moved to correct section