i think i get the same message, the server crashed right after i placed glass fibre cable to my rotary macerators, the macerators and redstone torches were placed first then i ran the cable, now when i start my server it seems to start fine but when i connect, i get the error and the world is completely empty except for me and mobs, no blocks at all, there is a link to a screenshot of my error window. i dont know how to copy the text from the server window...
i hope to see a resolution to this issue, there has been alot of time spent on this map already and i would hate to lose all that work