i am also using Tree Chopper mod, and it crashed when i cut down a tree.
crash-2017-03-12_17.06.09-server.txt

@kenijey On the surface this does not appear to be a Dynamic Surroundings issue. I do not see any of my mods code in that call stack. Have you reported to @DuchLord?

no i didn't, i will do it right now.
by the way, it didn't happen again. i don't know should i report this thing to the developers...

@kenijey Going to close this as a not a problem with Dynamic Surroundings. Not sure when TreeChopper will be updated - does not look to have a lot of activity. I will be more than willing to help figure the issue out if indeed it is a conflict.