I was trying to copy one building with Copy-Paste Tool from Building Gadgets Mod, i have copied my building, pasted it and then wanted to undo it. But insted of undoing it replaced all blocks in the building into invisible unbreakable block named "(Unused)Effect Block". I can be broken but even with Draconic Staff of Power it consumes abou 2 minutes to break 1 block. So if it is possible please write my in-game and break thos blocks xD
It would be helpful to post some coordinates of the invisible blocks, that way they staffer can track down the general area without making a mess.
Since the player has not been online after the creation of this thread, I will go ahead and mark this issue as done. If you come back to this thread and the issue is still prominent, please do not hesitate with letting us know!