http://pastebin.com/591n6Zi7
Now I'm in an infinite crash loop, the second I get on, it tries to harvest the cotton, and I crash.

latmod.ftbu.world.claims.ClaimedChunks.canPlayerInteract(ClaimedChunks.java:268)
did you ask the mod author of that claim mod for help?

(after 7 edits ... god damn you github markdown)

PS: oh nice, FTBUtilities have seen this only few times yet

and yet i feel stupid that i did not search first https://github.com/LatvianModder/FTBUtilities/issues/58

O_o how is this even possible ? there are several null checks ... i don't get it

Old version of the FTBUtilities mod?

wow .. this fakeplayer stuff is branching out very very far
#2575
#2983
yeah, as @MatthiasMann said try updating everything, from "forge" itself over "forge essentials" to "forge utils" and "forge tweaks"

BTW, the next Ender IO version (424) will have some "please don't crash" adaption in the fake player that might help. #3071

I'll take to tt about making that build later today.

everything that has "forge" in its name?

It's apparently been here since june according to those two issues, hard chance they patched it , gonna try anyways

at least forge utils had several updates
FTBUtilities-1.7.10-1.0.14.2 VS FTBUtilities-1.7.10-1.0.17.1 (severely outdated)
FTBLib-1.7.10-1.0.14.3 VS FTBLib-1.7.10-1.0.17.2 (severely outdated)
forge-1.7.10-10.13.4.1558 VS 10.13.4.1614 (well according to changelogs, minor fixes, just something with skull placing and armorstads and fuel handling)

and fun fact, prior 1.0.15.xx there seems to be no public code of forge utils ... maybe it was fixed in the closed sorce state prior getting to github

Thanks, it worked, still though, FTB should really update the pack