http://i.imgur.com/JHLAVDk.jpg

Ok, on the forum it seems the image got cut off to match the width of the forum, just click my imgur link or right click the image > open image in new tab.
My characters go in the pocket where Lungrot is and dance around but can't seem to add any materials or build it. They move back and forth in that one place like they cannot reach the place where they have to add the materials. This happens for both of these two machines that I placed right next to each other. I cannot dismantle them either, as the characters just dance around that one spot again. I have zipped up my save file and attached it as well. I have never had any issues with being unable to build things like this before.