Ahhh my apologies. See I'm not really into the modding side of things, I more just produce plugins and such. We've recently only just had this error after an update so my assumption would be to come to here since I'm also certain it's a forge issue. Apologies once again!
I don't think any more details are needed here really apart from we've recently come across a new issue which has this message
Adding world access to world net.minecraft.world.WorldServerMulti@5f7f69b5
This can pass but it can take 10 minutes to up to an hour. Is anyone else having this issue with 1.7.10 KCauldron?
Thanks