Im noticing this error being put in my console in multimc for my custom modpack I'm building
http://pastebin.com/hyrBQFYt

Mod list: http://pastebin.com/sgM0EFmx

Forge 1614 mc 1.7.10
Java 8 update 91
Mac os x 10.11.4

Does it make a crash?
If it does not, just ignore it. It is from gui config that im planning to.

I'd have to try and find the item that is associated with the error and try it.

I forgot to close this issue, since it was trivial.
Anyway this is fixed by adding configurations to Photoptics.