Not sure what is exactly going on as your log is a little hard to read as it lost most of the format.The one thing I do know is that you have a block that is ticking. If you are able to hover over it enough to remove it while in game then do that and try placing it again. If you cannot the normal way to fix a ticking block is to backup your saves and configs. Then use MCEdit to remove the ticking block. The one that is ticking is at 'Block location: World: (-27,41,75)'. The block might appear as air block or an unknown block in MCEdit, that is because MCEdit is not built for mods. It can remove the ticking block, but make sure you do not add or remove any other blocks to be safe.